Address review feedback from freben

- Use cli-defaults instead of listing individual CLI modules in
  create-app template and root package.json
- Move nodeTransform config files from cli-module-build to cli-node
  to avoid cross-module direct imports
- Rename cli-module-create-github-app to cli-module-github
- Start createCliModule init chain with Promise.resolve()
- Deduplicate exitWithError in runCliModule.ts
- Extract shared isCommandNodeHidden to @internal/cli
- Add explanatory comment for fromArray deduplication field
- Restore error for cli role packages missing bin in runCliExtraction

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

packages/cli-module-github/README.md

@@ -0,0 +1,14 @@
+# @backstage/cli-module-github
+
+CLI module that provides the `create-github-app` command for the Backstage CLI, used to create a new GitHub App in your organization for use with Backstage.
+
+## Commands
+
+| Command             | Description                                |
+| :------------------ | :----------------------------------------- |
+| `create-github-app` | Create new GitHub App in your organization |
+
+## Documentation
+
+- [Backstage Readme](https://github.com/backstage/backstage/blob/master/README.md)
+- [Backstage Documentation](https://backstage.io/docs)