## Summary
- Adds `deploy-twenty-app` and `install-twenty-app` composite actions to
`.github/actions/` so app repos can reference them remotely — same
pattern as `spawn-twenty-app-dev-test` for CI
- Updates `cd.yml` in template, hello-world, and postcard to use
`twentyhq/twenty/.github/actions/deploy-twenty-app@main` /
`install-twenty-app@main` instead of local `./.github/actions/` copies
- Removes the 6 local action files that were duplicated across template
and example apps
**Before** (each app repo carried its own action copies):
```yaml
uses: ./.github/actions/deploy
```
**After** (centralized, like CI):
```yaml
uses: twentyhq/twenty/.github/actions/deploy-twenty-app@main
```
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