feat: add sections filter & UI changes

- TNL-11973: Previously Filters functionality was only working for subsections and units inside sections. Now sections are also filtered.
- TNL-11974: New request, Show "no results found" if no results match the filters
- TNL-11975: UI Change, Align filter menu popup to left side of filter button
- TNL-11976: UI Change, Remove underline below "Course optimizer" title
- TNL-11978: UI Change, Change title to "Scan my course"
- TNL-11989: UI Change, Use empty space to display link, don't truncate text before the space runs out
- TNL-11977: New request, Remove this stuff(scanning steps) when scan is complete, it'll disappear after 2.5 seconds
- TNL-11979: UI Change, Move "This tool will scan your course..." text inside of Scan card
- TNL-11980: UI Change, Move "Last scanned on..." date text below Scan button
- TNL-11981: UI Change, Remove icon from "Start scanning" button
- TNL-11983: UI Change, "Start scanning" button should be smaller, made it medium sized
- TNL-11984: UI Change, Remove dividing line under subsection name in expanded card
- TNL-11985: UI Change, Fix alignment of dividing lines, links, and icons in expanded cards to match Figma.
- TNL-11986: UI Change, Match color of the broken icon with other Icons
- TNL-11987: UI Change, Fix alignment of Filter chips to match Figma
- Also added Beta Badge for course optimizer.
- Added tests for codecov coverage

src/header/hooks.test.js

@@ -117,8 +117,10 @@ describe('header utils', () => {
 
     it('when course optimizer enabled should include optimizer option', () => {
       useSelector.mockReturnValue({ enableCourseOptimizer: true });
-      const actualItemsTitle = renderHook(() => useToolsMenuItems('course-123')).result.current.map((item) => item.title);
-      expect(actualItemsTitle).toContain(messages['header.links.optimizer'].defaultMessage);
+      const optimizerItem = renderHook(() => useToolsMenuItems('course-123')).result.current.find(
+        item => item.href === '/course/course-123/optimizer',
+      );
+      expect(optimizerItem).toBeDefined();
     });
 
     it('when course optimizer disabled should not include optimizer option', () => {