Brandon Lucas 4eebaebb27 feat: implement Schema module for versioned types ...

Add Schema module with functions for creating and migrating versioned
values. This provides the runtime foundation for schema evolution.

Schema module functions:
- Schema.versioned(typeName, version, value) - create versioned value
- Schema.migrate(value, targetVersion) - migrate to new version
- Schema.getVersion(value) - get version number

Changes:
- Add Versioned, Migrate, GetVersion builtins to interpreter
- Add Schema module to global environment
- Add Schema module type to type environment
- Add 4 tests for schema operations
- Add examples/versioning.lux demonstrating usage

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-02-13 09:59:52 -05:00

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