feat(angular): upgrade to Angular 22, convert tutorial app to standalone, zoneless Angular

[ShaneK]

With this change, the app runs on Angular 22, Ionic 8, Capacitor 8, ionicons 8, and TypeScript 6. Every page and component is now standalone, so all the *.module.ts and *-routing.module.ts files are gone and routing is handled with loadComponent route configs (app.routes.ts, tabs.routes.ts). The build moves to the @angular/build (esbuild) application builder, linting moves from TSLint to the ESLint flat config (eslint.config.js), and the app is zoneless, so zone.js along with polyfills.ts and zone-flags.ts are removed. PhotoService now exposes photos as a signal and the gallery renders it with @for, and inject() replaces constructor injection where it reads cleaner.

Other

Note: @ionic/angular is pinned to a prerelease dev build (8.8.11-dev.11782911278.11f0315e) because Ionic 9 isn't out yet. We'll need to update the version to ^9 before merging this PR.

The native ios/ and android/ projects were regenerated for Capacitor 8.

Additionally, docs will be updated to reference these changes in the tutorial for this app.

[brandyscarney]

Looks good! One comment on the package-lock.json file.

[brandyscarney]

Adding a new review because I noticed some warnings in the terminal.