feat(aio): api pages styling

- Banner class code consolidation for API pages
- Set up temporary table of contents class and file
- API pages title styling
- Add color styling to doc-type listed on each API details page
- Classes and SCSS variables refactor
- Mobile optimization on headers, info-banner, and API pages
- API page table custom styling
- API Class Overview template code overview into table format

aio/src/app/embedded/api/api-list.component.html

@@ -1,4 +1,4 @@
-<div class="l-flex-wrap banner is-plain l-content-small api-filter">
+<div class="l-flex-wrap info-banner api-filter">
 
   <div class="form-select-menu">
     <button class="form-select-button has-symbol" (click)="toggleTypeMenu()">