[PM-15847] libs/components strict migration (#15738)

This PR migrates `libs/components` to use strict TypeScript.

- Remove `@ts-strict-ignore` from each file in `libs/components` and resolved any new compilation errors
- Converted ViewChild and ContentChild decorators to use the new signal-based queries using the [Angular signal queries migration](https://angular.dev/reference/migrations/signal-queries)
  - Made view/content children `required` where appropriate, eliminating the need for additional null checking. This helped simplify the strict migration.

---

Co-authored-by: Vicki League <vleague@bitwarden.com>

libs/components/src/disclosure/disclosure-trigger-for.directive.ts

@@ -1,5 +1,3 @@
-// FIXME: Update this file to be type safe and remove this and next line
-// @ts-strict-ignore
 import { Directive, HostBinding, HostListener, input } from "@angular/core";
 
 import { DisclosureComponent } from "./disclosure.component";
@@ -12,7 +10,7 @@ export class DisclosureTriggerForDirective {
   /**
    * Accepts template reference for a bit-disclosure component instance
    */
-  readonly disclosure = input<DisclosureComponent>(undefined, { alias: "bitDisclosureTriggerFor" });
+  readonly disclosure = input.required<DisclosureComponent>({ alias: "bitDisclosureTriggerFor" });
 
   @HostBinding("attr.aria-expanded") get ariaExpanded() {
     return this.disclosure().open;

libs/components/src/disclosure/disclosure.component.ts

@@ -1,5 +1,3 @@
-// FIXME: Update this file to be type safe and remove this and next line
-// @ts-strict-ignore
 import {
   Component,
   EventEmitter,
@@ -40,11 +38,10 @@ let nextId = 0;
   template: `<ng-content></ng-content>`,
 })
 export class DisclosureComponent {
-  private _open: boolean;
-
   /** Emits the visibility of the disclosure content */
   @Output() openChange = new EventEmitter<boolean>();
 
+  private _open?: boolean;
   /**
    * Optionally init the disclosure in its opened state
    */
@@ -54,14 +51,13 @@ export class DisclosureComponent {
     this._open = isOpen;
     this.openChange.emit(isOpen);
   }
+  get open(): boolean {
+    return !!this._open;
+  }
 
   @HostBinding("class") get classList() {
     return this.open ? "" : "tw-hidden";
   }
 
   @HostBinding("id") id = `bit-disclosure-${nextId++}`;
-
-  get open(): boolean {
-    return this._open;
-  }
 }