chore: Reverts tailwind and LSO Homepage

[bmartel]

Reverts #6885 and #6989

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[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.90%. Comparing base (858861f) to head (43f605b).
Report is 5 commits behind head on develop.

Files with missing lines	Patch %	Lines
label_studio/core/views.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #7007   +/-   ##
========================================
  Coverage    76.90%   76.90%           
========================================
  Files          175      175           
  Lines        14166    14166           
========================================
  Hits         10894    10894           
  Misses        3272     3272           

Flag	Coverage Δ
pytests	76.90% <80.00%> (ø)

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