Add State implementation

[Kyle-Ye]

Close #71

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 1.39860% with 141 lines in your changes are missing coverage. Please review.

Project coverage is 12.86%. Comparing base (3f405bf) to head (4f1282e).

❗ Current head 4f1282e differs from pull request most recent head d74f2fd. Consider uploading reports for the commit d74f2fd to get more accurate results

Files	Patch %	Lines
.../OpenSwiftUI/Data/Model/State/StoredLocation.swift	0.00%	85 Missing ⚠️
Sources/OpenSwiftUI/Data/Model/State/State.swift	0.00%	26 Missing ⚠️
...ces/OpenSwiftUI/View/Transaction/Transaction.swift	0.00%	10 Missing ⚠️
.../OpenSwiftUI/Core/Data/Property/PropertyList.swift	0.00%	9 Missing ⚠️
Sources/OpenSwiftUI/Core/Util/ThreadUtils.swift	0.00%	9 Missing ⚠️
...s/OpenSwiftUI/Core/Data/Location/AnyLocation.swift	0.00%	1 Missing ⚠️
...urces/OpenSwiftUI/Data/Model/Binding/Binding.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
- Coverage   13.21%   12.86%   -0.36%     
==========================================
  Files         185      187       +2     
  Lines        4374     4494     +120     
==========================================
  Hits          578      578              
- Misses       3796     3916     +120     

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