fix: CLI - Add log for daemon start

[bryphe-coder]

While going through the manual CLI flow with some people on the team, there was some confusion with the coder daemon command - the fact there was no output to confirm that the daemon started:

coder ~/coder (bryphe/fix/daemon-log) $ dist/coder_linux_amd64/coder daemon

This PR just adds a simple log to confirm that the daemon has started:

coder ~/coder (bryphe/fix/daemon-log) $ dist/coder_linux_amd64/coder daemon
2022-03-16 17:57:20.358 [INFO]  <daemon.go:53>  daemon started  {"url": "http://127.0.0.1:3000"}

Just throwing this out there. Feel free to reject if you have concerns about adding this @kylecarbs !

[kylecarbs]

Makes sense to me!

[codecov]

Codecov Report

Merging #464 (9f450bc) into main (810b2d2) will decrease coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #464      +/-   ##
==========================================
- Coverage   68.17%   68.11%   -0.07%     
==========================================
  Files         160      160              
  Lines        9258     9260       +2     
  Branches       79       79              
==========================================
- Hits         6312     6307       -5     
- Misses       2325     2331       +6     
- Partials      621      622       +1     

Flag	Coverage Δ
unittest-go-macos-latest	62.66% <100.00%> (+0.11%)	⬆️
unittest-go-ubuntu-latest	67.53% <100.00%> (-0.22%)	⬇️
unittest-go-windows-2022	62.11% <100.00%> (-0.31%)	⬇️
unittest-js	63.64% <ø> (ø)

Impacted Files	Coverage Δ
cli/daemon.go	82.89% <100.00%> (+0.46%)	⬆️
provisionersdk/serve.go	35.13% <0.00%> (-8.11%)	⬇️
peerbroker/dial.go	75.43% <0.00%> (-7.02%)	⬇️
provisionerd/provisionerd.go	77.94% <0.00%> (-1.48%)	⬇️
peer/conn.go	79.53% <0.00%> (+0.25%)	⬆️
coderd/provisionerdaemons.go	58.15% <0.00%> (+0.54%)	⬆️
database/db.go	68.96% <0.00%> (+13.79%)	⬆️

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