refactor(mem0-plugin): improve hook scripts, config parsing, and skill definitions

Update git commit capture with better error handling, enhance user prompt hook,
extend config parser capabilities, and refine skill docs for dream, health,
mcp, pin, and stats skills.

mem0-plugin/scripts/on_user_prompt.sh

@@ -90,9 +90,10 @@ if [ -n "$FILE_PATHS" ]; then
   cat <<EOF
 
 **FILE PATHS detected:** \`$FILE_PATHS\`
-Search mem0 for context about these files:
+Search mem0 for context about these files using the \`contains\` operator on \`metadata.files\`:
+- \`search_memories(query="<filename>", filters={"AND": [{"user_id": "$USER_ID"}, {"app_id": "$MEM0_PROJECT_ID"}, {"metadata.files": {"contains": "<filename>"}}]})\`
+- Also run a broader text search without the files filter as fallback:
 - \`search_memories(query="<filename without extension>", filters={"AND": [{"user_id": "$USER_ID"}, {"app_id": "$MEM0_PROJECT_ID"}]})\`
-Memories tagged with \`metadata.files\` containing these paths will surface via text match.
 EOF
 fi