refactor: Cpp WASM Lightweight Framework

[frankkopp]

Summary of Changes

This PR covers three major topics:

• Introduction of a CPP Framework for FBW C++ WASM
  • Migration of all flyPad backend modules to the new framework
• Improving Lighting Presets to load gradually and therefore allowing the knob animations to keep up
• Splitting the flyPad backend code into A32NX- and A380X-specific parts based on a common code part

Cpp WASM Framework MVP v0.1:

• Make VAR prefix configurable (compiler flag?)
• Add hasChanged-flag and check if vars has changed compared to previous read
  • add epsilon delta for change flag
• Check if values have changed after reading from sim to signal modules if something has changed or not
• Improve checking for existing vars - use the one if the faster update cycle
• add simple logging
• refactor data definition variables to use templates and allow more specialized classes
• add support for receiving events
• Migrate LightingPresets, AircraftPresets and Pushback
• Use better build tools (CMake, Ninja, etc.)
• add ClientDataArea Variable
• Key Events
• Input Events
• System Events
• StreamingClientDataAreaVariable

See README.md

Potential future enhancements - out of scope for this PR

• Migrate existing cpp modules into this (fadec, fbw, etc.)
• Make it a library
• Add Unit Test framework
• Add Logging Framework
• Add CommBus

Additional improvements to Lighting Presets:

Presets are now loaded gradually so that knobs are actually turn to the correct position.
Previously when a knob has been turn to far in one step the sim's animation wanted to turn the knob in the wrong direction
and became stuck on either 0 or 100 and therefore out of sync of the actual value.
https://user-images.githubusercontent.com/16833201/224556441-95f85c5e-3fc2-4f21-9d19-9adab80d79ce.mp4

Split of former flyPad backend into common, a32nx and a380x specific parts

Aircraft specific parts are minimal now so that adaption to A380X only requires specific aspect.
A380X adaption are not yet done as mostly the aircraft is not ready for them yet (presets). Pushback should already work well.

Discord username (if different from GitHub): Cdr_Maverick#6475

Supporters:
saschl#9432, Sven [de en]# 3752, tracernz#3313

Testing instructions

Test the flyPad related backend features:

• Aircraft Presets - should work as before
• Pushback - should work as before
• Lighting Presets - should work as before with the improvement that setting a preset happens gradually to make the knobs turn correctly

Otherwise there should be no difference for end users.

For Devs: Use the framework if anything needs a Cpp implementation - this is the best testing. As long as the existing functionality (former flyPad backend) works these test can be done while developing new Cpp modules.

How to download the PR for QA

Every new commit to this PR will cause a new A32NX artifact to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, click on the bottom PR tab
4. Click on the A32NX download link at the bottom of the page