add an mcp-integration skill, add playwright mcp

.claude/skills/mcp-integration/examples/http-server.json

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+{
+  "_comment": "Example HTTP MCP server configuration for REST APIs",
+  "rest-api": {
+    "type": "http",
+    "url": "https://api.example.com/mcp",
+    "headers": {
+      "Authorization": "Bearer ${API_TOKEN}",
+      "Content-Type": "application/json",
+      "X-API-Version": "2024-01-01"
+    }
+  },
+  "internal-service": {
+    "type": "http",
+    "url": "https://api.example.com/mcp",
+    "headers": {
+      "Authorization": "Bearer ${API_TOKEN}",
+      "X-Service-Name": "claude-plugin"
+    }
+  }
+}

.claude/skills/mcp-integration/examples/sse-server.json

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+{
+  "_comment": "Example SSE MCP server configuration for hosted cloud services",
+  "asana": {
+    "type": "sse",
+    "url": "https://mcp.asana.com/sse"
+  },
+  "github": {
+    "type": "sse",
+    "url": "https://mcp.github.com/sse"
+  },
+  "custom-service": {
+    "type": "sse",
+    "url": "https://mcp.example.com/sse",
+    "headers": {
+      "X-API-Version": "v1",
+      "X-Client-ID": "${CLIENT_ID}"
+    }
+  }
+}

.claude/skills/mcp-integration/examples/stdio-server.json

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+{
+  "_comment": "Example stdio MCP server configuration for local file system access. Use 'bunx' instead of 'npx -y' for Bun projects (faster and auto-downloads).",
+  "filesystem": {
+    "command": "npx",
+    "args": [
+      "-y",
+      "@modelcontextprotocol/server-filesystem",
+      "${CLAUDE_PROJECT_DIR}"
+    ],
+    "env": {
+      "LOG_LEVEL": "info"
+    }
+  },
+  "database": {
+    "command": "${CLAUDE_PLUGIN_ROOT}/servers/db-server.js",
+    "args": ["--config", "${CLAUDE_PLUGIN_ROOT}/config/db.json"],
+    "env": {
+      "DATABASE_URL": "${DATABASE_URL}",
+      "DB_POOL_SIZE": "10"
+    }
+  },
+  "custom-tools": {
+    "command": "python",
+    "args": ["-m", "my_mcp_server", "--port", "8080"],
+    "env": {
+      "API_KEY": "${CUSTOM_API_KEY}",
+      "DEBUG": "false"
+    }
+  }
+}