Add Prettier config + run on all files + add to pre-commit hook

[benvinegar]

Per @calirvine's request, adding Prettier to the project. The only config option is tabWidth: 4, which is how the project was already coded (and is just a reflection of my personal preference).

[codecov]

Codecov Report

Attention: 179 lines in your changes are missing coverage. Please review.

Comparison is base (7e83730) 71.78% compared to head (ef4ca23) 72.38%.

Files	Patch %	Lines
app/root.tsx	0.00%	38 Missing and 1 partial ⚠️
public/tracker.js	0.00%	39 Missing ⚠️
app/components/ui/card.tsx	58.20%	28 Missing ⚠️
app/components/TimeSeriesChart.tsx	54.76%	19 Missing ⚠️
app/components/ui/table.tsx	83.87%	15 Missing ⚠️
app/components/ui/select.tsx	90.69%	12 Missing ⚠️
app/analytics/query.ts	94.14%	11 Missing ⚠️
server.ts	0.00%	7 Missing ⚠️
app/routes/admin-redirect.tsx	0.00%	3 Missing ⚠️
app/routes/dashboard.tsx	97.00%	3 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   71.78%   72.38%   +0.60%     
==========================================
  Files          18       18              
  Lines        1701     1934     +233     
  Branches      110      115       +5     
==========================================
+ Hits         1221     1400     +179     
- Misses        474      528      +54     
  Partials        6        6              

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