Doxygen update

Workflow runs for Doxygen update

• Add a LibGitInitGuard to keep libgit2 initialized

  completed successfully:
  Doxygen update#15:Commitb3274f2pushedbyalt-graph
  main

  Oct 14, 202623s
  More actions for workflow run 15

• Run clang-format

  completed successfully:
  Doxygen update#14:Commite00c87epushedbyalt-graph
  main

  Jun 9, 202634s
  More actions for workflow run 14