chore: refactor Java modules to be under fullstack-core directory #937

All 105 tests pass, 4 skipped in 1m 7s

  26 files ±0   26 suites ±0 1m 7s ⏱️ +8s
109 tests ±0 105 ✔️ ±0 4 💤 ±0 0 ❌ ±0
110 runs ±0 106 ✔️ ±0 4 💤 ±0 0 ❌ ±0

Results for commit ba1b07e. ± Comparison against earlier commit 1d89c36.