🚧 [WIP] FMOD web support (HTML5)

[bitbrain]

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Closes #50

This PR aims to add support for web support via wasm.

Todo

• [x] update SConstruct to consider web as a platform
• [x] make scons platform=web pass & build libGodotFmod.web.template_debug.wasm32.wasm correctly
• [ ] Update documentation for how to build for web (requires Emscripten)
• [ ] Update Github Action to build for web
• [ ] Solve issue around bank file scanning (specifically file callback logic https://github.com/utopia-rise/fmod-gdextension/blob/master/src/callback/file_callbacks.cpp)

Known issues

• on Firefox, the GDExtension just hangs and crashes the browser. This is a known bug with wasm: https://github.com/webcompat/web-bugs/issues/127798