docs(angular): add cli builders content (#6893)

src/data/roadmaps/angular/content/cli-builders@TeWEy9I-hU6SH02Sy2S2S.md

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 # CLI Builders
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+A number of Angular CLI commands run a complex process on your code, such as building, testing, or serving your application. The commands use an internal tool called `Architect` to run CLI builders, which invoke another tool (bundler, test runner, server) to accomplish the desired task. Custom builders can perform an entirely new task or to change which third-party tool is used by an existing command.
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+Visit the following resources to learn more:
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+- [@official@Angular Official Docs - CLI Builders](https://angular.dev/tools/cli/cli-builder)
+- [@video@Angular Builders – Creating Custom Builder from Scratch](https://www.youtube.com/watch?v=QbDkDLnXAZE)
+- [@opensource@Angular Builders](https://github.com/just-jeb/angular-builders)