Ada iconography consistency

[jacbn]

Adds the basis for icons on Ada to work in the same way as they do on the Physics redesign.
Also adjusts the ascent-override property of Ada fonts to correctly vertically align the font, which has been ~2px too high since the site's inception, to make sure text-aligned elements (like icons) actually look aligned.

[codecov]

Codecov Report

Attention: Patch coverage is 54.38596% with 26 lines in your changes missing coverage. Please review.

Project coverage is 40.92%. Comparing base (71878d0) to head (55cd478).
Report is 2 commits behind head on redesign-2024.

Files with missing lines	Patch %	Lines
src/app/services/search.ts	26.92%	19 Missing ⚠️
src/app/components/elements/SearchInputs.tsx	73.07%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           redesign-2024    #1408      +/-   ##
=================================================
+ Coverage          40.90%   40.92%   +0.01%     
=================================================
  Files                493      493              
  Lines              21870    21874       +4     
  Branches            7195     7237      +42     
=================================================
+ Hits                8946     8951       +5     
+ Misses             12305    12304       -1     
  Partials             619      619              

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