feat(skills): auto-detect XML format version from Configuration.xml

When working with existing configs dumped from newer platforms (8.3.27+),
XML files use version="2.20" instead of "2.17". Skills now detect the
version from the nearest Configuration.xml walking up the directory tree,
falling back to "2.17" if not found. This prevents format version mismatch
errors during LoadConfigFromFiles.

Updated skills (11): meta-compile, form-compile, form-add, template-add,
cfe-borrow, epf-add-form, help-add, role-compile, subsystem-compile,
interface-edit. Also fixed form-validate to accept version 2.20.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/form-validate/scripts/form-validate.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# form-validate v1.3 — Validate 1C managed form
+# form-validate v1.4 — Validate 1C managed form
 # Source: https://github.com/Nikolay-Shirokov/cc-1c-skills
 
 import argparse
@@ -161,10 +161,10 @@ def main():
         report_error(f"Root element is '{localname(root)}', expected 'Form'")
     else:
         version = root.get("version", "")
-        if version == "2.17":
+        if version in ("2.17", "2.20"):
             report_ok(f"Root element: Form version={version}")
         elif version:
-            report_warn(f"Form version='{version}' (expected 2.17)")
+            report_warn(f"Form version='{version}' (expected 2.17 or 2.20)")
         else:
             report_warn("Form version attribute missing")