gh-36470: refresh macaulay2 interface a little bit
- changing the official link to macaulay2.com
- gather some optional annotations
- a few pep8 details fixed
### :memo: Checklist
- [x] The title is concise, informative, and self-explanatory.
- [x] The description explains in detail what this PR is about.
URL: https://github.com/sagemath/sage/pull/36470
Reported by: Frédéric Chapoton
Reviewer(s): Dima Pasechnik
