feat: pin Pocket DS virtual keyboard to lower display

[pacoa-kdbg]

Summary

• Configure the AYANEO Pocket DS virtual keyboard output as its lower physical display: DSI-2.
• Add a regression test for this device mapping.

Related pull requests

• Depends on #160 for the Pocket DS dual-screen desktop policy and its established DSI-1 (top) / DSI-2 (bottom) mapping.
• Requires #194, which adds the optional patched-KWin implementation that reads ARMADA_VIRTUAL_KEYBOARD_CONNECTOR.

After #160 and #194 are included in an image built with #194’s build_patched_kwin option, Plasma will pin Pocket DS’s virtual keyboard to the bottom DSI-2 display instead of following the active-output heuristic.

Test plan

• bash tests/pocket-ds-virtual-keyboard-test.sh
• for test_file in tests/*-test.sh; do bash "$test_file"; done
• git diff --check

[JPyke3]

Thanks for the PR.

Marking as blocked because we are waiting on some architectural changes in #194.

[justradical]

im pretty sure this can be closed, the screen should be pinning on the pocket ds