feat: Implement simple Project Summary page

[bryphe-coder]

This implements a very simple Project Summary page (which lists workspaces):

...which also has an empty state:

Fixes #66

[codecov]

Codecov Report

Merging #71 (3f556ee) into main (c7fb16e) will increase coverage by 0.97%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##             main      #71      +/-   ##
==========================================
+ Coverage   70.82%   71.79%   +0.97%     
==========================================
  Files          87       87              
  Lines        3455     3425      -30     
  Branches       56       55       -1     
==========================================
+ Hits         2447     2459      +12     
+ Misses        798      759      -39     
+ Partials      210      207       -3     

Flag	Coverage Δ
unittest-go-macos-latest	67.66% <ø> (+0.50%)	⬆️
unittest-go-ubuntu-latest	69.87% <ø> (+0.17%)	⬆️
unittest-go-windows-latest	67.34% <ø> (ø)
unittest-js	76.47% <83.33%> (+5.17%)	⬆️

Impacted Files	Coverage Δ
site/pages/projects/create.tsx	0.00% <0.00%> (ø)
site/test_helpers/mocks.ts	100.00% <100.00%> (ø)
site/util/array.ts	100.00% <100.00%> (ø)
site/pages/projects/index.tsx
peer/conn.go	76.64% <0.00%> (+1.19%)	⬆️
peerbroker/listen.go	82.81% <0.00%> (+2.34%)	⬆️

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[bryphe-coder]

Thanks for the review @kylecarbs ! 🙏