docs(faq): add new questions to faq

[woile]

Checklist

• Add test cases to all the changes you introduce
• Run ./script/format and ./script/test locally to ensure this change passes linter check and test
• Test the changes on the local machine manually
• Update the documentation for the changes

With this commit I will close #251

I think some information in the docs is enough, no need for a new command

[codecov]

Codecov Report

Merging #343 (bf3fce4) into master (055fc17) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #343      +/-   ##
==========================================
+ Coverage   97.20%   97.29%   +0.09%     
==========================================
  Files          35       35              
  Lines        1000      999       -1     
==========================================
  Hits          972      972              
+ Misses         28       27       -1     

Flag	Coverage Δ
unittests	97.29% <100.00%> (+0.09%)	⬆️

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

Impacted Files	Coverage Δ
commitizen/commands/init.py	91.66% <ø> (ø)
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/git.py	96.62% <100.00%> (+1.07%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8fabcff...bf3fce4. Read the comment docs.