v3.0.0 — Swift API Redesign & Full JSON Schema Support

v3.0.0 — Swift API Redesign & Full JSON Schema Support

Breaking Changes

• get<T>() accessors removed, replaced by typed require*() accessors (requireString, requireInt, etc.) — aligns with Swift API design guidelines (#45)
• JSONSchemaError.keyword changed from String to JSONSchemaKeyword enum for type-safe keyword handling (#52, #53)
• dump API redesigned — new JSON.Indent type replaces raw indent parameters; OutputOptions added to encoder
• Source files reorganized following Swift API design guidelines — imports may need updating (#49)

New Features

• Full JSON Schema support — core validation, composition keywords, array/object keywords, $ref/$id resolution, format validation, string content keywords, output/error reporting, draft-specific dispatch, schema generation from instances (#28, #30, #32-#45)
• Comparable conformance on JSON — enables sorted(), max(), min() and other Comparable-constrained APIs
• JSONWithUnknownKeys — captures unknown keys during decoding while preserving known-key structure
• Performance optimizations across parsing, serialization, and binary formats (#43)

Bug Fixes

• Comprehensive 13-phase bug hunt fixing correctness issues across all subsystems (#48)
• Type hierarchy aligned with nlohmann/json comparison semantics — fixes edge-case comparison behavior (#51)
• Various CBOR, BSON, MessagePack, UBJSON edge-case fixes
• Parser overflow and schema compilation fixes

Refactoring & Maintenance

• Source and test files reorganized into focused files by concern (#31, #49)
• Modernized test patterns with Swift Testing best practices (#46)
• DocC documentation comments added, README verified against API (#47)
• Removed stale plan files (PROGRESS.md, BUG_HUNT_PLAN.md, SCHEMA_PLAN.md)
• CLAUDE.md project instructions added

1,710 tests — all passing