refactor: refactor RTL style checker and update test cases

- Enhanced the RTL style checker script to include new diagnostic rules for function declarations, primary design units, and synthesis exclusions.
- Added functions to handle audit issues, ensuring that the audit records match the current inventory of RTL files.
- Updated test cases to reflect changes in RTL file names and paths, ensuring consistency with the new naming conventions.
- Introduced additional tests for style violations, including mismatched primary design units and synthesizable initial blocks.
- Adjusted file paths in various test files to align with the new RTL structure and naming conventions.

tests/test_memory_map.py

@@ -158,7 +158,7 @@ def test_bus_fault_responder_handles_reserved_and_unmapped_addresses(tmp_path: P
                 str(ROOT / "rtl/mini/top/rib2ribp.sv"),
                 str(ROOT / "rtl/mini/top/rib_error_slave.sv"),
                 str(ROOT / "rtl/mini/top/rib2ram.sv"),
-                str(ROOT / "rtl/mini/top/bus.sv"),
+                str(ROOT / "rtl/mini/top/rib_bus.sv"),
                 str(ROOT / "tests/rtl/bus_fault_tb.sv"),
                 "",
             ]
@@ -212,7 +212,7 @@ def test_sysctrl_fault_registers_record_and_clear_pending(tmp_path: Path) -> Non
                 str(ROOT / "rtl/managed/clusterip/common/rtl/utils/register.sv"),
                 str(ROOT / "rtl/managed/clusterip/common/rtl/cdc/cdc_sync.sv"),
                 str(ROOT / "rtl/ip/peripheral/pll_ctrl_if.sv"),
-                str(ROOT / "rtl/ip/peripheral/sysctrl.sv"),
+                str(ROOT / "rtl/ip/peripheral/ribp_sysctrl.sv"),
                 str(ROOT / "tests/rtl/sysctrl_fault_tb.sv"),
                 "",
             ]
@@ -267,10 +267,11 @@ def test_pll_controller_reconfigures_and_falls_back_to_the_safe_clock(tmp_path:
                 str(ROOT / "rtl/managed/clusterip/common/rtl/utils/edge_det.sv"),
                 str(ROOT / "rtl/ip/peripheral/pll_ctrl_if.sv"),
                 str(ROOT / "rtl/ip/peripheral/clint_timebase.sv"),
-                str(ROOT / "rtl/ip/peripheral/sysctrl.sv"),
+                str(ROOT / "rtl/ip/peripheral/ribp_sysctrl.sv"),
                 str(ROOT / "rtl/tech/tc_clk.sv"),
                 str(ROOT / "rtl/tech/tc_pll.sv"),
                 str(ROOT / "rtl/mini/top/rcu.sv"),
+                str(ROOT / "rtl/mini/top/pll_rcu_controller.sv"),
                 str(ROOT / "tests/rtl/pll_ctrl_tb.sv"),
                 "",
             ]
@@ -338,7 +339,7 @@ def test_pll_controller_reconfigures_and_falls_back_to_the_safe_clock(tmp_path:
 
 
 def test_sysctrl_does_not_expose_unused_i2c_or_qspi_select_registers() -> None:
-    rtl = (ROOT / "rtl/ip/peripheral/sysctrl.sv").read_text(encoding="utf-8")
+    rtl = (ROOT / "rtl/ip/peripheral/ribp_sysctrl.sv").read_text(encoding="utf-8")
     header = (ROOT / "crt/include/retrosoc/core/soc.h").read_text(encoding="utf-8")
 
     for symbol in (