feat: upgrade to Angular 20

[philenius]

Upgrade to Angular 20 as requested in #33

[Copilot]

Pull Request Overview

This PR upgrades the workspace and library to Angular 20, adjusts TypeScript configurations for new default includes, migrates to the new @angular/build builders, and adopts the inject() DI API.

• Update project and library tsconfig.*.json include/exclude patterns
• Switch Angular builders in angular.json to @angular/build
• Bump Angular dependencies to ^20.0.0 and migrate DI to inject()
• Add provideBrowserGlobalErrorListeners to app.config.ts and update library component DI

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tsconfig.spec.json	Broaden include to all .ts files (test runner)
tsconfig.app.json	Include all .ts, exclude specs for application build
src/app/app.config.ts	Add global error listeners provider
projects/ngx-annotate-text/tsconfig.spec.json	Broaden include to all .ts files for library tests
projects/ngx-annotate-text/tsconfig.lib.json	Include all .ts, exclude specs for library
projects/ngx-annotate-text/src/.../ngx-annotate-text.component.ts	Replace constructor DI with inject()
projects/ngx-annotate-text/package.json	Bump library version and peer dependencies to Angular 20
package.json	Bump workspace Angular dev and peer dependencies to Angular 20
angular.json	Migrate to @angular/build builders and simplified options
README.md	Update CLI and ESLint schematics to version 20
CHANGELOG.md	Add release notes for v20.0.0

Comments suppressed due to low confidence (3)

tsconfig.spec.json:9

• The spec tsconfig no longer includes .d.ts files, which may omit ambient type declarations during testing. Consider restoring "src/**/*.d.ts" in the include array.

"include": ["src/**/*.ts"]

projects/ngx-annotate-text/tsconfig.spec.json:9

• Similar to the workspace spec tsconfig, this file no longer includes .d.ts definitions. Add "src/**/*.d.ts" back to ensure ambient declarations are picked up in tests.

"include": ["src/**/*.ts"]

projects/ngx-annotate-text/src/lib/components/ngx-annotate-text/ngx-annotate-text.component.ts:29

• Make sure ElementRef and TokenizerService are imported at the top of this file when switching to inject(). Missing imports will cause build errors.

private elementRef: ElementRef = inject(ElementRef);