refactor(@angular-devkit/build-angular): move Vite dev-server @angular/build imports into separate file

To reduce the complexity of the move of the Vite-based dev-server builder
into the `@angular/build` package. The soon to be self-referencing imports
are now located in a separate file. Self-referencing imports are not well
supported inside the repository currently so this move allows the imports
to be adjusted in one location.

Author: clydin

packages/angular_devkit/build_angular/src/builders/dev-server/builder.ts

@@ -6,13 +6,13 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import { type IndexHtmlTransform, purgeStaleBuildCache } from '@angular/build/private';
 import type { BuilderContext } from '@angular-devkit/architect';
 import type { Plugin } from 'esbuild';
 import type http from 'node:http';
 import { EMPTY, Observable, defer, switchMap } from 'rxjs';
 import type { ExecutionTransformer } from '../../transforms';
 import { checkPort } from '../../utils/check-port';
+import { type IndexHtmlTransform, purgeStaleBuildCache } from './internal';
 import { normalizeOptions } from './options';
 import type { DevServerBuilderOutput } from './output';
 import type { Schema as DevServerBuilderOptions } from './schema';

packages/angular_devkit/build_angular/src/builders/dev-server/internal.ts

@@ -0,0 +1,22 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+export { BuildOutputFile, BuildOutputFileType } from '@angular/build';
+export {
+  type ApplicationBuilderInternalOptions,
+  type ExternalResultMetadata,
+  JavaScriptTransformer,
+  buildApplicationInternal,
+  createRxjsEsmResolutionPlugin,
+  getFeatureSupport,
+  getSupportedBrowsers,
+  isZonelessApp,
+  transformSupportedBrowsersToTargets,
+  type IndexHtmlTransform,
+  purgeStaleBuildCache,
+} from '@angular/build/private';

packages/angular_devkit/build_angular/src/builders/dev-server/vite-server.ts

@@ -6,18 +6,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import { BuildOutputFile, BuildOutputFileType } from '@angular/build';
-import {
-  type ApplicationBuilderInternalOptions,
-  type ExternalResultMetadata,
-  JavaScriptTransformer,
-  buildApplicationInternal,
-  createRxjsEsmResolutionPlugin,
-  getFeatureSupport,
-  getSupportedBrowsers,
-  isZonelessApp,
-  transformSupportedBrowsersToTargets,
-} from '@angular/build/private';
 import type { BuilderContext } from '@angular-devkit/architect';
 import type { json } from '@angular-devkit/core';
 import type { Plugin } from 'esbuild';
@@ -31,6 +19,19 @@ import { loadProxyConfiguration, normalizeSourceMaps } from '../../utils';
 import { loadEsmModule } from '../../utils/load-esm';
 import { buildEsbuildBrowser } from '../browser-esbuild';
 import { Schema as BrowserBuilderOptions } from '../browser-esbuild/schema';
+import {
+  type ApplicationBuilderInternalOptions,
+  type BuildOutputFile,
+  BuildOutputFileType,
+  type ExternalResultMetadata,
+  JavaScriptTransformer,
+  buildApplicationInternal,
+  createRxjsEsmResolutionPlugin,
+  getFeatureSupport,
+  getSupportedBrowsers,
+  isZonelessApp,
+  transformSupportedBrowsersToTargets,
+} from './internal';
 import type { NormalizedDevServerOptions } from './options';
 import type { DevServerBuilderOutput } from './output';