feat 1398: Introduction of UI tests into the Configuration UI project

[PDuwe]

closes #1398

Includes:

• jest and testing library setup
• sample tests of LoginView
• workflow 'Run Jest'
• fixing some lint-errors of existing files that caused the build to fail

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This change is 

[codecov]

Codecov Report

Merging #1458 (0e064c0) into master (4ae7a26) will increase coverage by 0.47%.
The diff coverage is n/a.

❗ Current head 0e064c0 differs from pull request most recent head df4171b. Consider uploading reports for the commit df4171b to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1458      +/-   ##
============================================
+ Coverage     78.64%   79.11%   +0.47%     
+ Complexity     2271     2228      -43     
============================================
  Files           232      232              
  Lines          7438     7252     -186     
  Branches        887      860      -27     
============================================
- Hits           5849     5737     -112     
+ Misses         1219     1158      -61     
+ Partials        370      357      -13     

Impacted Files	Coverage Δ
...ctit/ocelot/core/opentelemetry/DynamicSampler.java	60.00% <0.00%> (-30.00%)	⬇️
...rocks/inspectit/ocelot/bootstrap/AgentManager.java	62.50% <0.00%> (-4.17%)	⬇️
...ectit/ocelot/core/command/AgentCommandService.java	68.29% <0.00%> (-2.44%)	⬇️
...trumentation/actions/bound/BoundGenericAction.java	83.33% <0.00%> (-2.38%)	⬇️
...ore/opentelemetry/OpenTelemetryControllerImpl.java	78.12% <0.00%> (-0.40%)	⬇️
...tation/config/MethodHookConfigurationResolver.java	95.65% <0.00%> (-0.38%)	⬇️
...n/config/InstrumentationConfigurationResolver.java	97.25% <0.00%> (-0.10%)	⬇️
...spectit/ocelot/commons/models/command/Command.java	100.00% <0.00%> (ø)
...rumentation/rules/InstrumentationRuleSettings.java	100.00% <0.00%> (ø)
.../actions/bound/ConstantOnlyBoundGenericAction.java
... and 20 more

[MariusBrill]

Reviewed 13 of 13 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @PDuwe)

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-- commits line 2 at r1:
The code for the tests looks good. We'll keep this PR open until we have added the HowTo for testing.

[danipaniii]

Reviewed 4 of 4 files at r2, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @PDuwe)