- namespace refactor (example: wiGraphics:: -> wi::graphics)
- provided namespace compatibility macro for old user code: WICKEDENGINE_BACKWARDS_COMPATIBILITY_0_59
- resource manager will return `Resource` instead of `shared_ptr<Resource>` objects
- MAD shader optimizations
- implemented alpha to coverage with alpha tested materials when MSAA is enabled
- alpha testing fix with transparent shadow maps
- TLAS and scene buffers will be recreated less frequently when things get added/removed from the scene
fade manager is now time-based instead of frame-based;
wiImage moved to namespace instead of static class;
refactors;
editor updates;
contributing updates;
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