feat: Add taxonomies tab in home page

[yusuf-musleh]

Description

This PR adds a "Taxonomies" tab to the course authoring home page, and redirects to the taxonomies page when clicked.

Testing instructions

1. Run this branch in your local dev stack
2. Make sure you have the new_studio_mfe.use_new_home_page flag is enabled
3. Navigate to the course authoring home page: http://apps.local.edly.io:2001/course-authoring/home
4. Confirm that the taxonomies tab appears, as in the screenshot
5. Confirm that clicking on it navigates to the taxonomies list page

---

Private-ref: FAL-3699

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.93%. Comparing base (d44edb8) to head (0d1c6b7).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #923   +/-   ##
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  Coverage   91.93%   91.93%           
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  Files         571      571           
  Lines       10179    10183    +4     
  Branches     2205     2206    +1     
=======================================
+ Hits         9358     9362    +4     
  Misses        794      794           
  Partials       27       27           

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[ChrisChV]

@yusuf-musleh Looks good, only one minor nit 👍

• I tested this: I followed the testing instructions.
• I read through the code and considered the security, stability and performance implications of the changes.
• I tested that the UI can be used with a keyboard only (tab order, keyboard controls).
• Includes tests for bugfixes and/or features added.

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@yusuf-musleh 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[KristinAoki]

@yusuf-musleh I have recently pulled the most recent version of master which includes this work and the taxonomy tab is appearing for me even though I do not have taxonomies set up in my environment. Can you create a new PR that makes sure that the tab does not appear unless taxonomies is set up?

[yusuf-musleh]

@KristinAoki Sure thing, I'll look into it and create a new PR for that.