https://github.com/user-attachments/assets/4dece1ed-2326-4958-a2ed-2e57e51b3528

Summary

This PR implements the Pure Algebraic Migration System for ZIO Schema 2, addressing issue #519. It introduces a serializable, pure data representation of schema transformations (MigrationAction) and a typed API (Migration[A, B]) for evolving data structures without runtime overhead.

Key Changes

• Migration Actions: Defined the algebraic grammar for migrations (RenameField, AddField, DropField, TransformValue, etc.) in MigrationAction.
• Dynamic Core: Implemented DynamicMigration, a recursive engine that applies actions to DynamicValue structures, supporting both structural (Record/Enum) and value-level transformations.
• Typed API: Added Migration[A, B] wrapper that integrates with Schema[A] and Schema[B] to provide a type-safe user API.
• Error Handling: Implemented MigrationError with path tracking (DynamicOptic) for precise failure reporting.
• Testing: Added MigrationSpec verifying key operations (Rename, Add, Drop, Chaining) on both Scala 2.13 and Scala 3.

Verification

• Tests: All tests in MigrationSpec passed on Scala 2.13 and Scala 3.3.7.
• Formatting: Code formatted with scalafmt.

Demo

(Please check the attached video/screenshot of the passing tests) https://github.com/user-attachments/assets/4dece1ed-2326-4958-a2ed-2e57e51b3528

Closes #519

/claim #519