feat(schema): implement JsonPatch mechanism (#685)

/claim #685 Implements a fully functional JsonPatch type for diffing and patching JSON values, aligned with DynamicPatch architecture.

Features:

Core JsonPatch ADT mirroring DynamicPatch structure
LCS-based diffing algorithm in JsonDiffer
Strict, Lenient, and Clobber application modes
Full bidirectional conversion between JsonPatch and DynamicPatch
Comprehensive test suite spanning 38 tests (algebraic laws, roundtrips, edge cases)
Zero-allocation hot paths for performance