docs: Tidy up KeepassXC reference documentation

chore: Remove broken OpenIndiana tests

chore: Exclude Go files from website build

fix: Fix confusing error message when using builtin git to init over SSH

chore: Remove flaky concurrency-hammer test

chore: Tolerate GitHub rate limiting in tests

chore: Avoid partial updates in ArchLinux test

fix: Disable problematic concurrent source dir read

chore: Add test for concurrent read of .chezmoidata.<format> files

chore: Update dependencies