Added
- Esc clears a marked set, ahead of stepping back a view or quitting.
Raised live: "do we have a keybind to unselect all?" — after Ctrl-A
(toggle-all) turned out to invert a mixed marked set row-by-row rather
than cleanly clearing it (confirmed live), there was no key that reliably
gave up on a batch. Folded into Esc rather than a new bind, as its own
priority step: closes the details pane first if it's open as a peek
(unchanged), then clears a marked set if anything's marked (new), then
steps back a view or asks to quit (unchanged). Detecting "anything
marked" needed fzf's own $FZF_SELECT_COUNT, which only exists inside
the fzf process itself — a new MARKED_COUNT_FILE side-channel (same
pattern as the existing footer/header click files) carries it out, written
by the same marking binds that already update the live footer.
brew install ltdan-88/brew-launcher/brew-launcher
