Add 'routes' command

[Kludex]

@ycd There is a need to update the images, but I don't know how you generate them.

[codecov-commenter]

Codecov Report

Merging #57 (1825c75) into master (510ea4e) will increase coverage by 3.42%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   83.68%   87.11%   +3.42%     
==========================================
  Files           7        7              
  Lines         141      163      +22     
==========================================
+ Hits          118      142      +24     
+ Misses         23       21       -2     

Impacted Files	Coverage Δ
manage_fastapi/helpers.py	81.81% <100.00%> (+18.18%)	⬆️
manage_fastapi/main.py	85.41% <100.00%> (+12.44%)	⬆️
manage_fastapi/config.py	71.42% <0.00%> (-14.29%)	⬇️

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[ycd]

@Kludex we can merge this too if you want, then i can add images JFYK.

PS: I use carbon.now.sh to generate those images 😀

[Kludex]

I need to check the import again, I think I'm missing some error handling. Thanks!