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