- .cproject: exclude src/tests|jna|attic from the managed build (tests are
  many main() executables built by build_tests.sh, not the one-binary
  managed project); add ${workspace_loc}/src include path (indexer resolves
  test #includes); sync Release samples include path with live drift
- .project: second builder = .externalToolBuilders/build_tests.launch
  (runs src/tests/build_tests.sh on manual Build; machine-generic via
  workspace_loc variables)
- .settings: adopt live doxygen + UTF-8 encoding prefs
- .gitignore: ignore live /.externalToolBuilders (template copies up, then
  disconnects, per convention)
- README.md: the convention + what is workspace-level (CUDA toolkit pref,
  12.8 cuda-gdb debug configs)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>