ref(styles) deprecate space export and add space to theme

[JonasBa]

First step towards migrating space to theme obj. This change only deprecates the direct space export and not the one accessible on the theme

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
static/app/styles/space.tsx	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #75790      +/-   ##
==========================================
- Coverage   79.96%   78.16%   -1.81%     
==========================================
  Files        7064     6894     -170     
  Lines      316313   306751    -9562     
  Branches    52794    52794              
==========================================
- Hits       252953   239763   -13190     
+ Misses      62922    60600    -2322     
- Partials      438     6388    +5950     

[JonasBa]

Holding off on merging until I can validate this does not noticeably impact performance.

[getsantry]

This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you add the label WIP, I will leave it alone unless WIP is removed ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀

[natemoo-re]

I would love to see this change land!