[Feature] Effect HUD hider for PF2e

Problem: Too many damn effects in the top right by default many of which aren't super helpful to see all the time

Solution: Hide some of them (by default unless you click an expand button or something)

Things to surface:
- Conditions
- Effects with low time left (ie could expire in combat maybe 🤔)
- Other stuff

No files, tests, or entry points are named. Start by locating the PF2e effects HUD and clarify which effects are hidden by default, how expansion works, and what counts as low time remaining; done means the HUD applies the agreed filtering and expansion behavior.

Written by the indexing model from the issue text.