feat: enhance SoC topology and user extensions with APB targets and validation scripts

- Added APB target definitions in soc_topology.json for various peripherals.
- Introduced user_extensions.json to define user core and IP targets.
- Updated generate_filelist.py to include SVA paths.
- Refactored ip_apb_wrapper.sv to utilize generated APB interfaces and bridges.
- Simplified user_core_top.sv and user_ip_top.sv by including generated bindings.
- Implemented check_clock_reset_domains.py to validate clock/reset domains and CDC crossings.
- Updated regress.py to include SVA support in simulation commands.
- Added tests for clock/reset domain validation and user extensions generation.
- Enhanced test coverage for topology generation and APB target ownership validation.

tests/test_script_tools.py

@@ -306,6 +306,7 @@ def test_verilator_simulations_use_uniform_timeout() -> None:
     for _, values in regression_commands:
         if "SIMU=VERILATOR" in values:
             assert not any(value.startswith("SOC_SIM_TIME=") for value in values)
+            assert "HAVE_SVA=YES" in values
 
 
 def test_run_flow_writes_structured_result(tmp_path: Path) -> None: