CI: disable VR in the 'linux-build' job for now
SGPropertyNode: remove redundant Doxygen markup (header and implementation)
Reformat to make 'git clang-format' happy
Fix typos found by codespell; add missing SPDX headers in the affected files
Remove src/Main/runfgfs.bat.in which doesn't seem to be used anywhere
Add license: CC0 1.0 Universal
codespell: add ignore-multiline-regex
Update the pre-commit hooks (codespell update required)