FTA Notes for more than just team notes

**Is your feature request related to a problem? Please describe.**
As an FTA(A), there are often times I need to make notes about situations beyond just team troubleshooting. The current FTA Notes tool lets us track problems for a team across matches, and is a great tool to share information *about a team* between FTA(A)'s and CSAs. There are other things I need to make note of, like general field damage, arena fault conditions, "this is what I saw and why I made the decision I did". These notes give me (and other event leadership) an audit trail of decisions or information.

**Describe the solution you'd like**
1. The ability to create notes for a match, but not tied to a team
* e.g. "blue gate in match 2 stuck open. acceptance check was not run, ramp was twisted during setup"
2. The ability to create notes for a field, i.e. not tied to a team or match
* e.g. "field display keeps locking, replaced with personal trusted device during lunch"
3. The ability to create notes for an event, i.e. not tied to a team or match
* e.g. "staticide applied night before; humidity at 50% at 9am"

A bonus request is to make these notes available to FTAs outside of events. Like how as a Event Scoring Admin I can see the event Cycle Times report in the Cloud. (I will make a separate FTC Cloud feature request for this).

**Describe alternatives you've considered**
1. I currently use iPad Notes (with an Apple Pencil) to make these notes.

**Additional context**

No files, tests, or entry points are named. Start by tracing the existing FTA Notes flow and its data model, then determine how match-, field-, and event-level notes should be represented and accessed; done means each requested note scope works without requiring a team and existing team notes remain usable.

Written by the indexing model from the issue text.