Angular component templates in @Component({ template }) were parsed as TypeScript strings, so template highlighting and tag closing never applied. TypeScript files in Angular projects (angular.json or @angular/core) now use an Angular TypeScript mode that mounts the Angular template parser on literal template strings; other strings and non-Angular projects are unchanged. Inline and external templates both close tags on /, with multiple cursors and undo.
Closes#1895
Co-authored-by: jaw52 <[email protected]>
