feat(crossplatform): add Python 3 ports for all 58 PS1 skill scripts

Add cross-platform Python alternatives alongside existing PowerShell
scripts. PS1 remains the default runtime; Python is opt-in via switch
scripts. All parameters are identical between runtimes.

New files:
- 58 Python scripts in .claude/skills/*/scripts/*.py
- scripts/switch-to-python.py and switch-to-powershell.py
- docs/python-porting-guide.md
- __pycache__/ added to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/switch-to-python.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+# switch-to-python v1.1 — Switch skill .md files to use Python scripts
+# Source: https://github.com/Nikolay-Shirokov/cc-1c-skills
+"""Replaces powershell.exe invocations with python in all .md files under .claude/skills/."""
+import os, re, glob, sys
+
+def main():
+    repo_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    skills_dir = os.path.join(repo_root, '.claude', 'skills')
+
+    # Collect all .md files in skill directories (SKILL.md, json-dsl.md, etc.)
+    md_files = sorted(glob.glob(os.path.join(skills_dir, '*', '*.md')))
+    if not md_files:
+        print(f"Error: no .md files found in {skills_dir}", file=sys.stderr)
+        sys.exit(1)
+
+    rx = re.compile(r'powershell\.exe\s+(?:-NoProfile\s+)?-File\s+(.+?)\.ps1')
+    switched = 0
+    warnings = []
+
+    for md_path in md_files:
+        with open(md_path, 'r', encoding='utf-8') as f:
+            content = f.read()
+
+        matches = rx.findall(content)
+        if not matches:
+            continue
+
+        # Check that .py files exist
+        for m in matches:
+            clean_path = m.lstrip("'")
+            py_path = clean_path + '.py'
+            py_full = os.path.join(repo_root, py_path)
+            if not os.path.isfile(py_full):
+                skill_name = os.path.basename(os.path.dirname(md_path))
+                md_name = os.path.basename(md_path)
+                warnings.append(f"  WARN: {py_path} not found (referenced in {skill_name}/{md_name})")
+
+        new_content = rx.sub(r'python \1.py', content)
+        if new_content != content:
+            with open(md_path, 'w', encoding='utf-8') as f:
+                f.write(new_content)
+            skill_name = os.path.basename(os.path.dirname(md_path))
+            md_name = os.path.basename(md_path)
+            print(f"  [OK] {skill_name}/{md_name}")
+            switched += 1
+
+    print(f"\nSwitched {switched} file(s) to Python.")
+    if warnings:
+        print("\nWarnings (missing .py files):")
+        for w in warnings:
+            print(w)
+
+if __name__ == '__main__':
+    main()