Feature/user chore pfeat(buttons): add per-user Pause/Resume chore buttonsause buttons

[amandaworkman1988]

What this adds

Two button entities per user — "Pause Chores" and "Resume Chores" — for quick sick-day style control from any dashboard or the admin view.

While a user is paused, no overdue/missed stats accumulate and rotation chores advance past them (identical to the existing pause_user_chores service). Pressing Resume clears the pause.

How it works

• New UserChoresPauseButton class in button.py (one Pause + one Resume per user, created in async_setup_entry).
• async_press() calls the existing ChoreManager.set_user_chores_paused(assignee_id, paused=...). No new pause logic, no storage changes, no migration.
• Reuses existing device/translation/icon patterns.

Files changed

• const.py (button UID suffixes, translation keys, icons)
• button.py (UserChoresPauseButton + setup wiring)
• translations/en.json (button names)
• docs/user-chore-pause-buttons.md

Notes

• Momentary Pause/Resume buttons (the integration has no switch platform; a single toggle would need a switch platform).
• Buttons don't gate on approver auth; pausing is non-destructive and already exposed via the service.

Verification

Syntax-checked all files and confirmed the symbols used (coordinator.chore_manager, the new const keys) exist. The full Home Assistant test suite wasn't runnable in the authoring environment — please let CI run before merge.