doc(ring_theory/noetherian): add docstring, normalise notation (#2219)
* change notation; add module docstring
* adding reference to A-M
* Update src/ring_theory/noetherian.lean
Co-Authored-By: Bryan Gin-ge Chen <bryangingechen@gmail.com>
* Apply suggestions from code review
Co-authored-by: Scott Morrison <scott@tqft.net>
Co-authored-by: Bryan Gin-ge Chen <bryangingechen@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>