refactor(@angular/build): replace switch statements with Array.includes() in extension helpers

Replace switch-based extension checks in hasTemplateExtension and
hasTypeScriptExtension with Array.prototype.includes() for better
readability and conciseness.

Author: maruthang

packages/angular/build/src/tools/angular/angular-host.ts

@@ -262,28 +262,9 @@ export function createAngularCompilerHost(
 }
 
 function hasTemplateExtension(file: string): boolean {
-  const extension = nodePath.extname(file).toLowerCase();
-
-  switch (extension) {
-    case '.htm':
-    case '.html':
-    case '.svg':
-      return true;
-  }
-
-  return false;
+  return ['.htm', '.html', '.svg'].includes(nodePath.extname(file).toLowerCase());
 }
 
 function hasTypeScriptExtension(file: string): boolean {
-  const extension = nodePath.extname(file).toLowerCase();
-
-  switch (extension) {
-    case '.ts':
-    case '.tsx':
-    case '.mts':
-    case '.cts':
-      return true;
-  }
-
-  return false;
+  return ['.ts', '.tsx', '.mts', '.cts'].includes(nodePath.extname(file).toLowerCase());
 }