CI: add gradleapp

[pascalgrimaud]

• following support gradle init and wrapper #1292

[codecov]

Codecov Report

Merging #1299 (84d4bd7) into main (1503b4c) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main     #1299   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity      1557      1557           
===========================================
  Files            296       296           
  Lines           5031      5031           
  Branches          90        90           
===========================================
  Hits            5031      5031           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1503b4c...84d4bd7. Read the comment docs.