Refactoring of Logger module

[pavel-karatsiuba]

Use ['info', 'log', 'warn', 'error'] as values for --verbose

fixes: #674

[codecov]

Codecov Report

Base: 70.35% // Head: 70.42% // Increases project coverage by +0.07% 🎉

Coverage data is based on head (b26ec2e) compared to base (8a1fbe1).
Patch coverage: 83.33% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1785      +/-   ##
==========================================
+ Coverage   70.35%   70.42%   +0.07%     
==========================================
  Files          23       23              
  Lines        2587     2597      +10     
  Branches      591      594       +3     
==========================================
+ Hits         1820     1829       +9     
  Misses        661      661              
- Partials      106      107       +1     

Impacted Files	Coverage Δ
src/Downloader.ts	59.87% <ø> (ø)
src/Dump.ts	82.17% <ø> (ø)
src/MediaWiki.ts	81.57% <ø> (ø)
src/RedisStore.ts	74.54% <ø> (ø)
src/S3.ts	0.00% <ø> (ø)
src/util/articleRenderers.ts	71.27% <ø> (ø)
src/util/categories.ts	0.00% <ø> (ø)
src/util/dump.ts	76.62% <ø> (ø)
src/util/misc.ts	72.35% <ø> (ø)
src/util/mw-api.ts	83.06% <ø> (ø)
... and 5 more

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[kelson42]

• the value given should be checked, --verbose=ddd just pass. Like any other argument it should be check and if wrong an error should be displayed and mwoffliner should exit.
• In the usage, default value if nothing specified should be documented.
• It should be explain as well that the chosen level print also all the level greather than this. So if you should warn, you will get warn and errors
• Everything should be written to STDOUT except the errors, which should be printed to the STDERR
• Not sure, but I think default behaviour should print error, so like --verbose=error. Doing so would imply to not have any more solution for a "silent" mode... maybe a --verbose=none would be a solution?

[pavel-karatsiuba]

Added sanitizing for verbose option.
The verbose option can be empty or one of "info", "log", "warn", "error", or "quiet".
An empty value is equal to "info".
The default level is "error".
If --verbose=quiet then don't print messages.

[kelson42]

Please rebase and resolve conflicts, have also left a small style feedback

[kelson42]

LGTM