[EC 456] Component Library Content Switching Tabs (#3452)

* [EC-456] Rename bitTabItem -> bitTab

* [EC-456] Use templateRefs or text for tab label content

* [EC-456] Add bit-tab-nav-bar component

* [EC-456] Finish content tab switching and nav tabs

* [EC-456] Undo accidental eslintrc.json change

* [EC-456] Fix directive/component selector naming convention

* [EC-456] Cleanup unnecessary InjectionTokens and simplify template label property

* [EC-456] Cleanup one more unnecessary InjectionToken

* [EC-456] Cleanup tab styles to better match Figma. Add internal tab header component for styling header background according to Figma.

* [EC-456] Add sub-folders for nav, content, and shared tab components/directives

* [EC-456] Code/style cleanup

* [EC-456] Remove underscore from protected members

* [EC-456] Cleanup tab stories and forgotten any type.

* [EC-456] Fix dark theme story tab content text color

* [EC-456] Add missing padding to tab header

* [EC-456] Add tab content padding to align with tab headers

* [EC-456] Move bottom tab border to header to span entire content area

* [EC-456] Force text-main tab label color

* [EC-456] Undo text-main change

libs/components/src/tabs/shared/tab-header.component.ts

@@ -0,0 +1,14 @@
+import { Component } from "@angular/core";
+
+/**
+ * Component used for styling the tab header/background for both content and navigation tabs
+ */
+@Component({
+  selector: "bit-tab-header",
+  host: {
+    class:
+      "tw-h-16 tw-pl-4 tw-bg-background-alt tw-flex tw-items-end tw-border-0 tw-border-b tw-border-solid tw-border-secondary-300",
+  },
+  template: `<ng-content></ng-content>`,
+})
+export class TabHeaderComponent {}