Remove standalone true from platform and UIF (#15032)

Remove standalone: true from every instance since it's the default as of Angular 19.

libs/components/src/menu/menu-divider.component.ts

@@ -3,6 +3,5 @@ import { Component } from "@angular/core";
 @Component({
   selector: "bit-menu-divider",
   templateUrl: "./menu-divider.component.html",
-  standalone: true,
 })
 export class MenuDividerComponent {}

libs/components/src/menu/menu-item.directive.ts

@@ -6,7 +6,6 @@ import { Component, ElementRef, HostBinding, Input } from "@angular/core";
 @Component({
   selector: "[bitMenuItem]",
   templateUrl: "menu-item.component.html",
-  standalone: true,
   imports: [NgClass],
 })
 export class MenuItemDirective implements FocusableOption {

libs/components/src/menu/menu.component.ts

@@ -19,7 +19,6 @@ import { MenuItemDirective } from "./menu-item.directive";
   selector: "bit-menu",
   templateUrl: "./menu.component.html",
   exportAs: "menuComponent",
-  standalone: true,
   imports: [CdkTrapFocus],
 })
 export class MenuComponent implements AfterContentInit {