Split CLI modules into separate packages

Extract each CLI module from packages/cli/src/modules/ into its own
package under packages/cli-module-*. This enables independent versioning
and clearer dependency boundaries for each CLI capability.

Module mapping:
- auth → @backstage/cli-module-auth
- build → @backstage/cli-module-build
- config → @backstage/cli-module-config
- create-github-app → @backstage/cli-module-create-github-app
- info → @backstage/cli-module-info
- lint → @backstage/cli-module-lint
- maintenance → @backstage/cli-module-maintenance
- migrate → @backstage/cli-module-migrate
- new → @backstage/cli-module-new
- test → @backstage/cli-module-test-jest
- translations → @backstage/cli-module-translations

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

packages/cli-module-lint/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "@backstage/cli-module-lint",
+  "version": "0.1.0",
+  "description": "CLI module for Backstage CLI",
+  "backstage": {
+    "role": "cli-module"
+  },
+  "publishConfig": {
+    "access": "public",
+    "main": "dist/index.cjs.js",
+    "types": "dist/index.d.ts"
+  },
+  "homepage": "https://backstage.io",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/backstage/backstage",
+    "directory": "packages/cli-module-lint"
+  },
+  "license": "Apache-2.0",
+  "main": "src/index.ts",
+  "types": "src/index.ts",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "backstage-cli package build",
+    "clean": "backstage-cli package clean",
+    "lint": "backstage-cli package lint",
+    "prepack": "backstage-cli package prepack",
+    "postpack": "backstage-cli package postpack",
+    "test": "backstage-cli package test"
+  },
+  "dependencies": {
+    "@backstage/cli-common": "workspace:^",
+    "@backstage/cli-node": "workspace:^",
+    "chalk": "^4.0.0",
+    "cleye": "^2.3.0",
+    "eslint": "^8.6.0",
+    "fs-extra": "^11.2.0",
+    "globby": "^11.0.0",
+    "shell-quote": "^1.8.1"
+  },
+  "devDependencies": {
+    "@backstage/cli": "workspace:^",
+    "@types/fs-extra": "^11.0.0",
+    "@types/shell-quote": "^1.7.5"
+  }
+}