fix(ci): fix black/ruff failures, add CoC and PR template

- Fix Python formatting (sync no longer strips blank lines from .py files)
- Remove test_community_build.py (tests private sync module)
- Fix ruff warnings in test files
- Add CODE_OF_CONDUCT.md
- Add .github/PULL_REQUEST_TEMPLATE.md

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

core/tool_generator.py

@@ -14,6 +14,7 @@ from core.tool_registry import ToolDefinition
 
 logger = logging.getLogger(__name__)
 
+
 # Plugin type fallback mapping - used when a plugin has no sites configured
 # WooCommerce can fallback to WordPress sites (same URL, credentials)
 # NOTE: Using fallback is NOT recommended in production. Always configure
@@ -23,6 +24,7 @@ PLUGIN_SITE_FALLBACK = {
     # Add more fallbacks as needed
 }
 
+
 def get_site_plugin_type_with_fallback(plugin_type: str, site_manager) -> str:
     """
     Get the site configuration plugin type for a given plugin.
@@ -60,6 +62,7 @@ def get_site_plugin_type_with_fallback(plugin_type: str, site_manager) -> str:
     # Return original type (may have no sites)
     return plugin_type
 
+
 class ToolGenerator:
     """
     Generate tools directly from plugin classes.