Use pre-commit as the linter

[frostming]

Close #48

Install the commit hooks in dev:

poetry run pre-commit install

Run in CI: I recommend using pre-commit ci, it can upgrade the hooks and commit linter changes automatically. It is also blazing fast, e2e run time is < 10s

BTW, the code is changed by the linter so this is better to merge after #55, otherwise there will be lots of conflicts

[codecov-commenter]

Codecov Report

Merging #56 (1d04bf3) into main (26b94d2) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
+ Coverage   42.45%   42.50%   +0.04%     
==========================================
  Files          16       16              
  Lines        1279     1280       +1     
==========================================
+ Hits          543      544       +1     
  Misses        736      736              

Flag	Coverage Δ
unittests	42.50% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lobbyboy/config.py	73.38% <100.00%> (+0.43%)	⬆️
lobbyboy/contrib/provider/digitalocean.py	29.03% <100.00%> (ø)
lobbyboy/contrib/provider/footloose.py	92.15% <100.00%> (ø)
lobbyboy/contrib/provider/ignite.py	55.76% <100.00%> (ø)
lobbyboy/contrib/provider/linode.py	29.34% <100.00%> (ø)
lobbyboy/contrib/provider/multipass.py	52.54% <100.00%> (ø)
lobbyboy/contrib/provider/vagrant.py	31.11% <100.00%> (ø)
lobbyboy/main.py	44.30% <100.00%> (ø)
lobbyboy/provider.py	67.36% <100.00%> (ø)
lobbyboy/server.py	29.12% <100.00%> (ø)
... and 3 more

---

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[messense]

I've requested pre-commit ci permission, @laixintao can you grant it?

[messense]

Looks like pre-commit ci is configured.