Several deprecations

[alan-agius4]

No description provided.

[gemini-code-assist]

Code Review

This pull request implements the deprecation of Angular's Webpack-based build system across several packages, including @angular-devkit/build-angular, @angular-devkit/build-webpack, and @ngtools/webpack. Changes include adding deprecation metadata to the release configuration, marking various interfaces and classes with @deprecated JSDoc tags, and introducing runtime warning logs in builders to guide users toward the newer esbuild and Vite-based @angular/build package. I have no feedback to provide.

[dgp1130]

Consider: Can we link to docs in log statements for the builders which aren't drop-in replacements?

The build system migration doc seems useful here. Not sure if there's a similar one for the old SSR builders.

[alan-agius4]

This PR was merged into the repository. The changes were merged into the following branches:

• main: 23af499

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