feature: CLI 'to' supports simple names

Author: NeedleInAJayStack

Sources/CLI/Convert.swift

@@ -45,4 +45,14 @@ extension Measurement: ExpressibleByArgument {
     }
 }
 
-extension Units.Unit: ExpressibleByArgument {}
+extension Units.Unit: ExpressibleByArgument {
+    public init?(argument: String) {
+        if let unit = try? Self(fromName: argument) {
+            self = unit
+        } else if let unit = try? Self(fromSymbol: argument) {
+            self = unit
+        } else {
+            return nil
+        }
+    }
+}