docs: Adds homebrew to install instructions

Author: NeedleInAJayStack

README.md

@@ -1,11 +1,11 @@
 # Units 📏
 
-Units is a Swift package to manipulate, compare, and convert between physical quantities. This package models measurements, 
-which are a numerical value with a unit of measure. It has been designed so that users don't need to worry whether they are 
+Units is a Swift package to manipulate, compare, and convert between physical quantities. This package models measurements,
+which are a numerical value with a unit of measure. It has been designed so that users don't need to worry whether they are
 using a defined unit (like `Newton`) or a complex composite unit (like `kg*m/s^2`). Both should be easy to convert to and from
 different units, perform arithmetic operations, check dimensionality, or serialize to and from a string format.
 
-This approach allows us to easily handle any permutation of units. You want to convert `12 km³/hr/N` to 
+This approach allows us to easily handle any permutation of units. You want to convert `12 km³/hr/N` to
 `ft²*s/lb`? We've got you covered!
 
 Included is a convenient command-line tool for performing quick unit conversions. See the [CLI section](#cli) for details.
@@ -34,8 +34,8 @@ let drivingDistance = drivingSpeed * drivingTime
 print(drivingDistance.convert(to: .mile)) // Prints 30 mi
 ```
 
-The type names in this package align closely with the unit system provided by `Foundation`. This was intentional to provide a 
-familiar nomenclature for Swift developers. The APIs have been designed to avoid namespace ambiguity in files where both `Units` 
+The type names in this package align closely with the unit system provided by `Foundation`. This was intentional to provide a
+familiar nomenclature for Swift developers. The APIs have been designed to avoid namespace ambiguity in files where both `Units`
 and `Foundation` are imported as much as possible. However, if an issue arises, just qualify the desired package like so:
 
 ```swift
@@ -76,7 +76,7 @@ Only linear conversions are supported. The vast majority of unit conversions are
 conversion coefficient, sometimes with a constant shift. Units that don't match this format (like currency conversions, which are
 typically time-based functions) are not supported.
 
-Composite units are those that represent complex quantities and dimensions. A good example is `horsepower`, whose quantity is 
+Composite units are those that represent complex quantities and dimensions. A good example is `horsepower`, whose quantity is
 `mass * length^2 / time^2`.
 
 ### Coefficients
@@ -85,18 +85,18 @@ Each quantity has a single "base unit", through which the units of that quantity
 chosen to be these base units for all quantities.
 
 Non-base units require a conversion coefficient to convert between them and other units of the same dimension. This coefficient
-is the number of base units there are in one of the defined unit. For example, `kilometer` has a coefficient of `1000` 
+is the number of base units there are in one of the defined unit. For example, `kilometer` has a coefficient of `1000`
 because there are 1000 meters in 1 kilometer.
 
-Composite units must have a coefficient that converts to the composte SI units of those dimensions. That is, `horsepower` should 
+Composite units must have a coefficient that converts to the composte SI units of those dimensions. That is, `horsepower` should
 have a conversion to `kilogram * meter^2 / second^2` (otherwise known as `watt`). This is natural for SI quantities and units, but
-care should be taken that a single, absolute base unit is chosen for all non-SI quantities since they will impact all composite 
+care should be taken that a single, absolute base unit is chosen for all non-SI quantities since they will impact all composite
 conversions.
 
 ### Constants
 
 Units that include a constant value, such as Fahrenheit, cannot be used within composite unit conversions. For example,
-you may not convert `5m/°F` to `m/°C` because its unclear how to handle their shifted scale. Instead use the 
+you may not convert `5m/°F` to `m/°C` because its unclear how to handle their shifted scale. Instead use the
 non-shifted Kelvin and Rankine temperature units to refer to temperature differentials.
 
 ## Serialization
@@ -125,7 +125,7 @@ Expressions are a mathematical combination of measurements. Arithemetic operator
 - `5.3 m + 3.8 m`
 - `5m^2/s + (1m + 2m)^2 / 5s`
 
-There are few expression parsing rules to keep in mind: 
+There are few expression parsing rules to keep in mind:
 
 - All parentheses must be matched
 - All measurement operators must have a leading and following space. i.e. ` * `
@@ -200,7 +200,7 @@ print(weeklyCartons)  // Prints '350.0 carton/week'
 To support deserialization and runtime querying of available units, this package keeps a global
 registry of the default units. The `Unit.define` method does not insert new definitions into this
 registry. While this avoids conflicts and prevents race conditions, it also means that units created
-using `Unit.define` cannot be deserialized correctly or looked up using `Unit(fromSymbol:)` 
+using `Unit.define` cannot be deserialized correctly or looked up using `Unit(fromSymbol:)`
 
 If these features are absolutely needed, and the implications are understood, custom units can be
 added to the registry using `Unit.register`:
@@ -214,7 +214,7 @@ let centifoot = try Unit.register(
 )
 ```
 
-Note that you may only register the unit once globally, and afterwards it should be accessed 
+Note that you may only register the unit once globally, and afterwards it should be accessed
 either by the assigned variable or using `Unit(fromSymbol: String)`.
 
 To simplify access, `Unit` may be extended with a static property:
@@ -231,8 +231,15 @@ Again, unless strictly necessary, `Unit.define` is preferred over `Unit.register
 
 ## CLI
 
-The command-line interface can be built and installed by running the command below. Note that 
-[swift](https://www.swift.org/download/) must be installed.
+The easiest way to install the CLI is with brew:
+
+```sh
+brew tap NeedleInAJayStack/tap
+brew install units
+```
+
+Alternatively, you can build it from source and install it to `/usr/local/bin/` using the install script. Note that
+[swift](https://www.swift.org/download/) must be installed, and you need write permissions to `/usr/local/bin/`.
 
 ```bash
 ./install.sh
@@ -274,4 +281,3 @@ unit list
 
 Contributions are absolutely welcome! If you find yourself using a custom unit a lot, feel free
 to stick it in an MR, and we can add it to the default list!
-