fix(@schematics/angular): add MCP configuration file to new workspaces

Changes:
  - Add .vscode/mcp.json template with angular-cli MCP server configuration
  - Update .gitignore template to whitelist .vscode/mcp.json
  - Update workspace schematic tests to expect mcp.json file

  Closes #31888

Author: alessiopelliccione

packages/schematics/angular/workspace/files/__dot__gitignore.template

@@ -26,6 +26,7 @@ yarn-error.log
 !.vscode/tasks.json
 !.vscode/launch.json
 !.vscode/extensions.json
+!.vscode/mcp.json
 .history/*
 
 # Miscellaneous

packages/schematics/angular/workspace/files/__dot__vscode/mcp.json.template

@@ -0,0 +1,9 @@
+{
+  // For more information, visit: https://angular.dev/ai/mcp
+  "mcpServers": {
+    "angular-cli": {
+      "command": "npx",
+      "args": ["-y", "@angular/cli", "mcp"]
+    }
+  }
+}

packages/schematics/angular/workspace/index_spec.ts

@@ -29,6 +29,7 @@ describe('Workspace Schematic', () => {
       jasmine.arrayContaining([
         '/.vscode/extensions.json',
         '/.vscode/launch.json',
+        '/.vscode/mcp.json',
         '/.vscode/tasks.json',
         '/.editorconfig',
         '/angular.json',
@@ -70,6 +71,7 @@ describe('Workspace Schematic', () => {
       jasmine.arrayContaining([
         '/.vscode/extensions.json',
         '/.vscode/launch.json',
+        '/.vscode/mcp.json',
         '/.vscode/tasks.json',
         '/angular.json',
         '/.gitignore',