Add Claude Code plugin scaffold for single-repo install

Consolidates plugin components (hooks, commands, skills, MCP config)
into this repo so it can be installed with:
  claude plugins install github:ViktorBarzin/claude-memory-mcp

- .claude-plugin/plugin.json: manifest with all hook events
- mcp/memory-mcp.json: MCP server config using existing src/
- hooks/: compaction survival, auto-recall, auto-learn, auto-approve
- commands/: /remember and /recall slash commands
- skills/: memory-management skill
- Bump MCP server to v2.0.0 with metaclaw migration fallback
- Update README with quick install and plugin hooks docs

hooks/auto-allow-memory-tools.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+"""
+Auto-allow hook for claude-memory plugin tools.
+
+This PermissionRequest hook automatically allows any tool whose name matches
+the claude_memory MCP server pattern to proceed without user confirmation.
+
+Environment variables:
+  DEBUG_CLAUDE_MEMORY_HOOKS=1          Enable debug logging to stderr
+  DISABLE_CLAUDE_MEMORY_AUTO_APPROVE=1 Disable auto-approve (for debugging)
+"""
+
+import json
+import os
+import re
+import sys
+
+DEBUG = os.environ.get("DEBUG_CLAUDE_MEMORY_HOOKS", "").lower() in ("1", "true", "yes")
+DISABLED = os.environ.get("DISABLE_CLAUDE_MEMORY_AUTO_APPROVE", "").lower() in (
+    "1",
+    "true",
+    "yes",
+)
+
+# Match any tool from this plugin's MCP server, resilient to slug variations
+# e.g. mcp__plugin_claude-memory_claude_memory__memory_store
+#      mcp__claude_memory__memory_recall
+TOOL_PATTERN = re.compile(r"mcp__.*claude_memory__(?:memory_|secret_)")
+
+
+def debug(msg: str) -> None:
+    """Print debug message to stderr if DEBUG is enabled."""
+    if DEBUG:
+        print(f"[claude-memory] {msg}", file=sys.stderr)
+
+
+def main() -> None:
+    if DISABLED:
+        debug("Auto-approve disabled via DISABLE_CLAUDE_MEMORY_AUTO_APPROVE")
+        sys.exit(0)
+
+    try:
+        input_data = json.load(sys.stdin)
+    except json.JSONDecodeError as e:
+        print(f"Error: Invalid JSON input: {e}", file=sys.stderr)
+        sys.exit(1)
+
+    tool_name = input_data.get("tool_name", "")
+    debug(f"Permission request for: {tool_name}")
+
+    if TOOL_PATTERN.search(tool_name):
+        debug(f"Auto-allowing: {tool_name}")
+        output = {
+            "hookSpecificOutput": {
+                "hookEventName": "PermissionRequest",
+                "decision": {
+                    "behavior": "allow",
+                },
+            }
+        }
+        json.dump(output, sys.stdout)
+    else:
+        debug(f"Not a claude-memory tool, passing through: {tool_name}")
+
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()