Issues/90 - add documentation

[komuw]

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Now,

What(What have you changed?)

• add proper documentation
• Start tracking changes in a changelog
• Add more type hints
• run mypy across the entire repo

How

Why(Why did you change it?)

• closes: add proper documentation #90
• run mypy in strict mode #86

References:

[codecov-io]

Codecov Report

Merging #92 into master will decrease coverage by 0.17%.
The diff coverage is 96.62%.

@@            Coverage Diff             @@
##           master      #92      +/-   ##
==========================================
- Coverage   85.41%   85.23%   -0.18%     
==========================================
  Files          10       12       +2     
  Lines         898      901       +3     
==========================================
+ Hits          767      768       +1     
- Misses        131      133       +2

Impacted Files	Coverage Δ
naz/q.py	78.57% <ø> (ø)	⬆️
naz/__version__.py	100% <ø> (ø)	⬆️
naz/throttle.py	91.83% <ø> (ø)	⬆️
naz/sequence.py	84.61% <ø> (ø)	⬆️
naz/hooks.py	81.25% <ø> (ø)	⬆️
naz/correlater.py	93.1% <100%> (ø)	⬆️
naz/ratelimiter.py	96.96% <100%> (ø)	⬆️
cli/cli.py	70.07% <100%> (ø)	⬆️
naz/logger.py	100% <100%> (ø)
naz/state.py	100% <100%> (ø)
... and 4 more

---

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[komuw]

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