refactor(@schematics/angular): add trailing commas to generated directive, pipe, and guard files

Enforces consistent code formatting in generated artifacts by adding trailing commas to class metadata and other relevant object literals in directives, pipes, and guards.

(cherry picked from commit 3b536d9)

Author: MeAkib

packages/schematics/angular/directive/files/__name@dasherize__.__type@dasherize__.ts.template

@@ -1,8 +1,8 @@
 import { Directive } from '@angular/core';
 
 @Directive({
-  selector: '[<%= selector %>]'<% if(!standalone) {%>,
-  standalone: false<%}%>
+  selector: '[<%= selector %>]',<% if(!standalone) {%>
+  standalone: false,<%}%>
 })
 export class <%= classifiedName %> {
 

packages/schematics/angular/guard/implements-files/__name@dasherize____typeSeparator__guard.ts.template

@@ -2,7 +2,7 @@ import { Injectable } from '@angular/core';
 import { <%= routerImports %> } from '@angular/router';
 
 @Injectable({
-  providedIn: 'root'
+  providedIn: 'root',
 })
 export class <%= classify(name) %>Guard implements <%= implementations %> {
   <% if (implements.includes('CanActivate')) { %>canActivate(

packages/schematics/angular/pipe/files/__name@dasherize____typeSeparator__pipe.ts.template

@@ -1,8 +1,8 @@
 import { Pipe, PipeTransform } from '@angular/core';
 
 @Pipe({
-  name: '<%= camelize(name) %>'<% if(!standalone) {%>,
-  standalone: false<%}%>
+  name: '<%= camelize(name) %>',<% if(!standalone) {%>
+  standalone: false,<%}%>
 })
 export class <%= classify(name) %>Pipe implements PipeTransform {