Removes Orion references

[desertaxle]

Removes all removable references to Orion and closes #81

Checklist

• References any related issue by including "Closes #" or "Closes ".
  • If no issue exists and your change is not a small fix, please create an issue first.
• Includes tests or only affects documentation. Does not change functionality
• Passes pre-commit checks.
  • Run pre-commit install && pre-commit run --all locally for formatting and linting.
• Includes screenshots of documentation updates. Does not change documentation rendering
  • Run mkdocs serve view documentation locally.
• Summarizes PR's changes in CHANGELOG.md