🔧 chore: add MCP server configuration and update gitignore

Add .mcp.json with Context7, Nx MCP, and Angular MCP server configurations.
Remove .mcp.json and .memory.json from gitignore to allow tracking MCP configuration.

.mcp.json

@@ -0,0 +1,18 @@
+{
+  "mcpServers": {
+    "context7": {
+      "type": "sse",
+      "url": "https://mcp.context7.com/sse"
+    },
+    "nx-mcp": {
+      "type": "stdio",
+      "command": "npx",
+      "args": ["nx-mcp@latest"]
+    },
+    "angular-mcp": {
+      "type": "stdio",
+      "command": "npx",
+      "args": ["@angular/cli", "mcp"]
+    }
+  }
+}