feat(language-service): Add getTypeDefinitionAtPosition (go to type definition) (#39145)

This commit adds the implementation for providing "go to type definition"
functionality in the Ivy Language Service.

PR Close #39145

packages/language-service/test/project/app/app.component.ts

@@ -8,10 +8,15 @@
 
 import {Component} from '@angular/core';
 
+export interface Address {
+  streetName: string;
+}
+
 /** The most heroic being. */
 export interface Hero {
   id: number;
   name: string;
+  address?: Address;
 }
 
 @Component({

packages/language-service/test/project/app/main.ts

@@ -24,6 +24,7 @@ import * as ParsingCases from './parsing-cases';
     ParsingCases.TestComponent,
     ParsingCases.TestPipe,
     ParsingCases.WithContextDirective,
+    ParsingCases.CompoundCustomButtonDirective,
   ]
 })
 export class AppModule {

packages/language-service/test/project/app/parsing-cases.ts

@@ -12,6 +12,7 @@ import {Hero} from './app.component';
 
 @Directive({
   selector: '[string-model]',
+  exportAs: 'stringModel',
 })
 export class StringModel {
   @Input() model: string = 'model';
@@ -69,6 +70,11 @@ export class WithContextDirective {
   }
 }
 
+@Directive({selector: 'button[custom-button][compound]'})
+export class CompoundCustomButtonDirective {
+  @Input() config?: {color?: string};
+}
+
 @Pipe({
   name: 'prefixPipe',
 })