feat: [FC-86] Course about Intro section

[PKulkoRaccoonGang]

Note

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Description

This PR adds a new Intro section to the Course About page. In addition, the basic page layout and a modal window for displaying a video about the course were configured.

Initial setup

1. Clone and install the tutor-mfe plugin from the draft PR that adds support for Catalog MFE.
2. Go to http://apps.local.openedx.io:1998/catalog/courses

How Has This Been Tested?

1. Open catalog/courses/<course_id>/about Course About page
2. Ensure the content of the Intro section matches the legacy version
3. Try changing course information, including course image and video, through the Schedule and details page

Merge Checklist

• If your update includes visual changes, have they been reviewed by a designer? Send them a link to the Sandbox, if applicable.
• Is there adequate test coverage for your changes?

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[codecov]

Codecov Report

❌ Patch coverage is 97.38372% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.64%. Comparing base (2552216) to head (9710e48).

Files with missing lines	Patch %	Lines
src/generic/modal-container/index.tsx	0.00%	4 Missing ⚠️
src/index.tsx	50.00%	2 Missing ⚠️
src/course-about/CourseAboutPage.tsx	95.00%	1 Missing ⚠️
src/header/hooks/useMenuItems.ts	96.42%	1 Missing ⚠️
src/home/HomePage.tsx	94.73%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #13      +/-   ##
==========================================
+ Coverage   95.32%   96.64%   +1.31%     
==========================================
  Files          25       59      +34     
  Lines         171      506     +335     
  Branches       21       78      +57     
==========================================
+ Hits          163      489     +326     
- Misses          8       17       +9     

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[PKulkoRaccoonGang]

Reopened at raccoongang#19