feat(docs-infra): add the ability to expose globals (#34237)

Adds the ability to expose global symbols in the API docs via the `@globalApi` tag. Also supports optionally setting a namespace which will be added to the name automatically (e.g. `foo` will be renamed to `ng.foo`). Relevant APIs should also be exported through the `global.ts` file which will show up under `core/global`.

PR Close #34237

aio/tools/transforms/angular-api-package/index.js

@@ -24,6 +24,8 @@ module.exports =
         .processor(require('./processors/extractPipeParams'))
         .processor(require('./processors/matchUpDirectiveDecorators'))
         .processor(require('./processors/addMetadataAliases'))
+        .processor(require('./processors/addGlobalApiData'))
+        .processor(require('./processors/updateGlobalApiPath'))
         .processor(require('./processors/computeApiBreadCrumbs'))
         .processor(require('./processors/filterContainedDocs'))
         .processor(require('./processors/processClassLikeMembers'))
@@ -95,6 +97,7 @@ module.exports =
             'common/testing/index.ts',
             'common/upgrade/index.ts',
             'core/index.ts',
+            'core/global.ts',
             'core/testing/index.ts',
             'elements/index.ts',
             'forms/index.ts',