[CL-854] feat: add bit-header component to component library (#17662)

Add new bit-header component to libs/components with:
  - Header component with left, center, and right content projection
  - Storybook stories for documentation
  - Export from component library index

libs/components/src/header/header.component.ts

@@ -0,0 +1,19 @@
+import { ChangeDetectionStrategy, Component, input } from "@angular/core";
+
+@Component({
+  selector: "bit-header",
+  templateUrl: "./header.component.html",
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  standalone: true,
+})
+export class HeaderComponent {
+  /**
+   * The title of the page
+   */
+  readonly title = input.required<string>();
+
+  /**
+   * Icon to show before the title
+   */
+  readonly icon = input<string>();
+}