prusalink: add continue-job button for ATTENTION state

[heikkih]

Proposed change

Adds a Continue button to the PrusaLink integration. The button calls api.continue_job() (available in pyprusalink 2.2.0) and is enabled when the printer is in the ATTENTION state — for example when paused for a timelapse capture or awaiting user intervention after a filament event.

Why this is a separate button from "Resume"

Resume and Continue look superficially similar but map to different printer states and different API endpoints:

	Resume	Continue
API endpoint	PUT /api/v1/job/{id}/resume	PUT /api/v1/job/{id}/continue
Enabled when	state == PAUSED	state == ATTENTION
Use cases	Manual pause (user pressed pause), error pause	Timelapse capture pause, printer-initiated pauses awaiting user acknowledgement

These are distinct state transitions in the firmware — ATTENTION means the printer needs explicit user acknowledgement to proceed, while PAUSED is a normal pause. Only one of the two buttons is enabled at any given time, depending on the current printer state.

Note on user docs

The user-facing docs at home-assistant/home-assistant.io (source/_integrations/prusalink.markdown) will be updated in a separate PR after this lands, covering this distinction along with the other recent integration changes (new sensors, location → suggested area, etc.).

This is part of a series of incremental improvements to the prusalink integration; #169309, #169312, #170092, #170099, and #170105 are already merged. Depends on the continue_job method introduced in pyprusalink 2.2.0 which was wired up by #170105.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (non-breaking change which fixes an issue)
• Code quality improvements to existing code or addition of tests

Checklist

• The code change is tested and works locally
• Local tests pass (33 passed, 2 new)
• Lint (ruff), mypy, and hassfest all pass
• There is no commented out code in this PR

[Copilot]

Pull request overview

Adds a new “Continue job” button entity to the PrusaLink integration to support printers in the ATTENTION state (mapping to PrusaLink.continue_job() from pyprusalink>=2.2.0), including translations/icons and test coverage.

Changes:

• Add a continue_job button entity that is available only when printer.state == ATTENTION.
• Add integration strings and an icon for the new button.
• Add button tests plus a new ATTENTION job/status fixture.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/components/prusalink/test_button.py	Adds tests validating the new Continue button behavior (available in ATTENTION, unavailable otherwise) and Conflict → HomeAssistantError handling.
tests/components/prusalink/conftest.py	Adds a fixture to model ATTENTION state in both job and status responses.
homeassistant/components/prusalink/strings.json	Adds the “Continue job” button translation.
homeassistant/components/prusalink/icons.json	Adds the icon for the new “Continue job” button.
homeassistant/components/prusalink/button.py	Registers the new Continue button entity and availability predicate for ATTENTION.