Release v0.3.0

Enhanced test coverage with realistic AXI module examples

This release improves the SystemVerilog parser test suite by integrating
realistic examples inspired by the pulp-platform/axi project, providing
better validation of parser capabilities with real-world constructs.

Key improvements:
- Added 'Real-World AXI Module Parsing' test suite with 3 test cases
- AXI FIFO, demux, and crossbar module examples
- Realistic naming conventions from industry-standard implementations
- All 13 tests passing with enhanced coverage

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