feat(tui): add a single-press session abort and /abort - #53656

feat(tui): add a single-press session abort and /abort#53656

Nowaker wants to merge 2 commits into

anomalyco:devanomalyco/opencode:devfrom

Nowaker:abort-keybind-feedbackNowaker/opencode:abort-keybind-feedbackCopy head branch name to clipboard