feat: React+Tailwind

[dcramer]

Swaps our usage to be Vite-based per https://developers.cloudflare.com/workers/vite-plugin/

[dcramer]

1. No clue if this is going to work in prod yet. Need to figure out how to test on a new worker.

2. I'm not totally happy w/ the split of code. Might instead do client/shared/worker

Really the main issue w/ the code split is we need TOOL_DEFINITIONS, and need to tree shake out all the other junk and avoid e.g. process.env causing an error....

[codecov]

Codecov Report

Attention: Patch coverage is 5.48780% with 310 lines in your changes missing coverage. Please review.

Project coverage is 72.46%. Comparing base (bd492eb) to head (5c27a6c).
Report is 12 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/mcp/toolDefinitions.ts	0.32%	306 Missing ⚠️
src/mcp/server.ts	0.00%	2 Missing ⚠️
src/worker/index.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #38       +/-   ##
===========================================
- Coverage   84.37%   72.46%   -11.92%     
===========================================
  Files          18       22        +4     
  Lines        2829     2836        +7     
  Branches      181      188        +7     
===========================================
- Hits         2387     2055      -332     
- Misses        442      781      +339     

Flag	Coverage Δ
evals	29.51% <1.52%> (+0.03%)	⬆️
unittests	69.70% <5.19%> (-11.92%)	⬇️

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[dcramer]

Pushed this into prod and it def works. Will fix tests and merge.

(still need to figure out why CF preview envs are totally non existant)