v0.1.0-rc.3 - Read-only mode and changeset error mapping

What's Changed

Read-Only Mode (Issue #12)

• New option for macro
• When , only generates and tools
• Prevents create, update, destroy operations
• Perfect for public read-only access to data

Changeset Error Mapping (Issue #13)

• Enhanced error messages from Ecto changeset validations
• Automatic categorization of validation errors (presence, format, inclusion, etc.)
• Improved database error detection (unique_violation, foreign_key_violation, not_null_violation)
• Schema changeset integration using schema's function

Testing

• 193 tests (up from 172)
• 21 new tests: 16 for read-only mode, 6 for error mapping
• All tests passing
• Credo and Dialyzer clean

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Closes #12, #13