add github actions for gradle based builds

[atomfrede]

updates #1297

[codecov]

Codecov Report

Merging #1342 (c284dec) into main (303cbfd) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##                main     #1342   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity      1557      1559    +2     
===========================================
  Files            296       296           
  Lines           5034      5037    +3     
  Branches          90        92    +2     
===========================================
+ Hits            5034      5037    +3     

Impacted Files	Coverage Δ
...s/application/GitHubActionsApplicationService.java	100.00% <100.00%> (ø)
...hub/actions/domain/GitHubActionsDomainService.java	100.00% <100.00%> (ø)
...astructure/primary/rest/GitHubActionsResource.java	100.00% <100.00%> (ø)
...hipster/lite/generator/project/domain/Project.java	100.00% <100.00%> (ø)

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[pascalgrimaud]

thanks a lot @atomfrede !

[atomfrede]

Bounty claimed https://opencollective.com/generator-jhipster/expenses/73020

[pascalgrimaud]

@atomfrede : approved