feat: Reactive Platform data

[marc2332]

Closes #634
Depends on #631

[codecov]

Codecov Report

Attention: Patch coverage is 56.11511% with 61 lines in your changes are missing coverage. Please review.

Project coverage is 73.00%. Comparing base (128b962) to head (7142337).
Report is 6 commits behind head on main.

❗ Current head 7142337 differs from pull request most recent head eb930f0

Please upload reports for the commit eb930f0 to get more accurate results.

Files	Patch %	Lines
crates/renderer/src/app.rs	0.00%	25 Missing ⚠️
crates/core/src/platform_state.rs	23.07%	10 Missing ⚠️
crates/renderer/src/event_loop.rs	0.00%	5 Missing ⚠️
crates/hooks/src/use_theme.rs	0.00%	4 Missing ⚠️
crates/renderer/src/accessibility.rs	0.00%	4 Missing ⚠️
crates/hooks/src/use_preferred_theme.rs	0.00%	3 Missing ⚠️
crates/testing/src/test_handler.rs	76.92%	3 Missing ⚠️
crates/devtools/src/lib.rs	0.00%	2 Missing ⚠️
crates/freya/src/launch.rs	0.00%	2 Missing ⚠️
crates/hooks/src/use_init_native_platform.rs	95.45%	2 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #635      +/-   ##
==========================================
- Coverage   73.00%   73.00%   -0.01%     
==========================================
  Files         192      194       +2     
  Lines       19151    19172      +21     
==========================================
+ Hits        13981    13996      +15     
- Misses       5170     5176       +6     

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