feat: add RTL coding style guidelines and enforce ownership-aware rules

- Introduced a comprehensive RTL coding style document at  detailing naming conventions, module structure, formatting, and ownership boundaries.
- Updated  to reference the new coding style document and clarify the python3 /nfs/share/home/miaoyuchi/retroSoC/scripts/check_rtl_style.py --root /nfs/share/home/miaoyuchi/retroSoC \
  --profile owned --changed-only --verible-verilog-lint verible-verilog-lint
rtl-style-check: owned passed (0 baseline findings) process.
- Refactored several RTL modules in  to adhere to the new naming conventions for clock and reset signals.
- Created  to define profiles for owned, verification, and technology RTL sources, including suffixes and linting rules.
- Developed  to check for compliance with the ownership-aware RTL style rules, focusing on positional connections and legacy constructs.
- Added tests in  to validate the functionality of the RTL style checker.
- Updated  to document the new style checking script and its usage.

tests/test_rtl_style.py

@@ -0,0 +1,60 @@
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+SCRIPT = ROOT / "scripts/check_rtl_style.py"
+
+
+def run_style(tmp_path: Path, source: str) -> subprocess.CompletedProcess[str]:
+    (tmp_path / "rtl/ip/test.sv").parent.mkdir(parents=True)
+    (tmp_path / "rtl/ip/test.sv").write_text(source, encoding="utf-8")
+    (tmp_path / "rtl/rtl_style_manifest.json").write_text(
+        json.dumps(
+            {
+                "schema_version": 1,
+                "profiles": {
+                    "owned": {
+                        "roots": ["rtl/ip"],
+                        "suffixes": [".sv"],
+                        "format": "verible",
+                        "lint": "strict",
+                    }
+                },
+            }
+        ),
+        encoding="utf-8",
+    )
+    subprocess.run(["git", "init", "-q", str(tmp_path)], check=True)
+    subprocess.run(["git", "-C", str(tmp_path), "add", "."], check=True)
+    return subprocess.run(
+        [sys.executable, str(SCRIPT), "--root", str(tmp_path), "--profile", "owned"],
+        text=True,
+        capture_output=True,
+        check=False,
+    )
+
+
+def test_owned_style_rejects_positional_connections(tmp_path: Path) -> None:
+    result = run_style(
+        tmp_path,
+        "module test(input logic clk_i, output logic data_o);\n"
+        "  dffr #(1) u_reg (clk_i, 1'b1, 1'b0, data_o);\n"
+        "endmodule\n",
+    )
+    assert result.returncode == 1
+    assert "module-port" in result.stderr
+
+
+def test_owned_style_allows_named_connections(tmp_path: Path) -> None:
+    result = run_style(
+        tmp_path,
+        "module test(input logic clk_i, output logic data_o);\n"
+        "  dffr #(1) u_reg (.clk_i(clk_i), .rst_n_i(1'b1), .dat_i(1'b0), .dat_o(data_o));\n"
+        "endmodule\n",
+    )
+    assert result.returncode == 0, result.stderr