fix: resolve WASM file loading issue for npx execution (closes #31)

- Enhanced database adapter to support multiple WASM file resolution strategies
- Added require.resolve() for reliable package location in npm environments
- Made better-sqlite3 an optional dependency
- Improved error handling with clear messages
- Updated version to 2.7.13
- Updated CHANGELOG and README badges

test-claude-desktop-config.json

@@ -0,0 +1,13 @@
+{
+  "mcpServers": {
+    "n8n-mcp-local": {
+      "command": "node",
+      "args": ["/Users/romualdczlonkowski/Pliki/n8n-mcp/n8n-mcp/dist/mcp/index.js"],
+      "env": {
+        "MCP_MODE": "stdio",
+        "LOG_LEVEL": "error",
+        "DISABLE_CONSOLE_OUTPUT": "true"
+      }
+    }
+  }
+}