[WEB] CleanAir about page redesign

[OchiengPaul442]

Summary of Changes (What does this PR do?)

• Refactored code: Created a new, separate component to handle language switching functionality
• Implemented the redesigned 'About' page for the Clean Air site as per the new design specifications

Status of maturity (all need to be checked before merging):

• I've tested this locally
• I consider this code done
• This change ready to hit production in its current state

Screenshots (optional)

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (61cfbe9) 8.06% compared to head (58d5ac3) 37.58%.
Report is 41 commits behind head on staging.

Files	Patch %	Lines
website/frontend/src/components/nav/TopBar.js	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           staging    #1809       +/-   ##
============================================
+ Coverage     8.06%   37.58%   +29.51%     
============================================
  Files          164       59      -105     
  Lines        11508      596    -10912     
  Branches         0      115      +115     
============================================
- Hits           928      224      -704     
+ Misses       10580      355    -10225     
- Partials         0       17       +17     

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[github-actions]

New Website changes available for preview here

[Baalmart]

Thanks @OchiengPaul442 , this looks neat! :)