Faltfe feature/support angular 22

[wing328]

PR checklist

• Read the contribution guidelines.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in WSL)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
  IMPORTANT: Do NOT purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

---

Summary by cubic

Adds Angular 22 support to the typescript-angular generator and sets 22.0.0 as the default. If you still target Angular 21 or below, set ngVersion in your config to the desired version.

• New Features

  • Added Angular 22 support for the typescript-angular generator and updated docs (9.x–22.x).
  • New configs: bin/configs/typescript-angular-v22.yaml and bin/configs/typescript-angular-v22-provided-in-root.yaml.
  • New Petstore samples for v22 (library and provided-in-root) with tests; CI workflow updated to include v22 samples.

• Dependencies

  • typescript: >=6.0.0 <6.1.0
  • rxjs: 7.4.0
  • ng-packagr: 22.0.0
  • zone.js: 0.15.0

^{Written for commit cfd4fe5. Summary will update on new commits.}