Add Bindable implementation

[Kyle-Ye]

Close #236

[codecov]

Codecov Report

❌ Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 23.99%. Comparing base (e861efc) to head (374962f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ources/OpenSwiftUICore/Data/Binding/Bindable.swift	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #534      +/-   ##
==========================================
- Coverage   24.01%   23.99%   -0.02%     
==========================================
  Files         506      507       +1     
  Lines       28985    28996      +11     
==========================================
- Hits         6960     6957       -3     
- Misses      22025    22039      +14     

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