Update quickstart, clear by name and cleanup with less threads

[twonirwana]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 83.95062% with 13 lines in your changes missing coverage. Please review.

Project coverage is 70.42%. Comparing base (52ebb3b) to head (7e23f7e).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ava/de/janno/discord/bot/command/ClearCommand.java	54.54%	10 Missing ⚠️
...ommand/customParameter/CustomParameterCommand.java	0.00%	0 Missing and 2 partials ⚠️
...java/de/janno/discord/connector/api/Requester.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #624      +/-   ##
============================================
+ Coverage     70.31%   70.42%   +0.10%     
- Complexity     1213     1226      +13     
============================================
  Files           109      109              
  Lines          5767     5822      +55     
  Branches        586      594       +8     
============================================
+ Hits           4055     4100      +45     
- Misses         1273     1283      +10     
  Partials        439      439              

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