Port native implementation of style transfer to C++ #227. This is a part
of a larger effort to merge native code from Kotlin and Objective C to a
single implementation in C++.

Old style transfer modules have been replaced by new, stateful
implementation. For this purpose non-static versions of useModule and
BaseModule have been introduced.
Old implementations of style transfer have been removed. Added methods
for handling fetching data via https that are passed on as function
objects to C++.
- Ported image processing capabilities equivalent to the ObjC/Kotlin
implementations.
- `ModelHostObject` serves as an automatic interface between model
implementations and JSI. This is done by template metaprogramming;
defining methods in `JsiConversions.h` for types used by the model is
necessary for it to work.
- A factory method for loading a style transfer model is registered in
`RnExecutorchInstaller`.

- `common/rnexecutorch/jsi` originates from react-native-audio-api
- `base64.*` is used for converting from base64 due to
https://renenyffenegger.ch/notes/development/Base64/Encoding-and-decoding-base-64-with-cpp/
- `ada` is a header-only library for parsing urls due to
https://github.com/ada-url/ada
- headers for Executorch 0.6 have been updated
- OpenCV 4.11.0 dependency is introduced for Android/C++. For iOS the
version is bumped via Cocoapods to 4.11.0.
- C10 headers are the dependency of OpenCV.

- Exceptions in native C++ do not result in promise getting rejected
when forwarding yet.
- Garbage collection can malfunction for host objects. C++ host objects
need to notify JS runtime about their size via external memory pressure
for the garbage collector to know to free them. This is not yet done.

## Description

Fix exception handling in C++ native code so that it results in JS
promise getting rejected with an appropriate message. There are two
fixes here:
1. Runtime type information in the current version of React Native is
disabled because one of its dependencies, which results in C++ not being
able to recognize that `std::runtime_error` is inheriting from
`std::exception` so to extract the exception message we need to match
the type exactly. A fix has been introduced in RN repo, but not yet
present in any release:
facebook/react-native@3132cc8.
2. When rejecting a promise the old code was accessing JS runtime in an
unsafe way, this is fixed now.

### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

### Tested on

- [x] iOS
- [x] Android

## Description

In the C++ code we need some interface between raw JSI and our logic
using JS promises. The current implementation uses too many nested
lambdas, as well requires `std::function` bindings to each lambda.

### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

### Tested on

- [x] iOS
- [x] Android

### Related issues

#255

## Description

Add generic loading of host functions in C++.

### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

### Tested on

- [x] iOS
- [x] Android

## Description

Make the model host function installation generic, so that you can
easily introduce additional methods that resolve with a promise.

### Tested on

- [x] iOS
- [x] Android

### Related issues

#255 

### Checklist

- [x] I have performed a self-review of my code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [x] My changes generate no new warnings

Port image segmentation native code to C++.

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

- [x] iOS
- [x] Android

- [x] I have performed a self-review of my code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [x] My changes generate no new warnings

---------

Co-authored-by: Mateusz Sluszniak <56299341+msluszniak@users.noreply.github.com>

## Description

Remove a dangling reference when handling exceptions in forward method
in native C++.

### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

### Tested on

- [x] iOS
- [x] Android

### Checklist

- [x] I have performed a self-review of my code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [x] My changes generate no new warnings