Add @backstage/cli-defaults package

Introduces a new `@backstage/cli-defaults` package that re-exports all
standard CLI modules as a single array, simplifying dependency management
for consumers. The CLI's `CliInitializer` is updated to support array
exports alongside single module exports. The create-app template,
changesets, and CLI fallback are updated to use `@backstage/cli-defaults`
instead of listing 11 individual modules.

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

packages/cli/package.json

@@ -48,17 +48,7 @@
   },
   "dependencies": {
     "@backstage/cli-common": "workspace:^",
-    "@backstage/cli-module-auth": "workspace:^",
-    "@backstage/cli-module-build": "workspace:^",
-    "@backstage/cli-module-config": "workspace:^",
-    "@backstage/cli-module-create-github-app": "workspace:^",
-    "@backstage/cli-module-info": "workspace:^",
-    "@backstage/cli-module-lint": "workspace:^",
-    "@backstage/cli-module-maintenance": "workspace:^",
-    "@backstage/cli-module-migrate": "workspace:^",
-    "@backstage/cli-module-new": "workspace:^",
-    "@backstage/cli-module-test-jest": "workspace:^",
-    "@backstage/cli-module-translations": "workspace:^",
+    "@backstage/cli-defaults": "workspace:^",
     "@backstage/cli-node": "workspace:^",
     "@backstage/errors": "workspace:^",
     "@backstage/eslint-plugin": "workspace:^",