Release nnn v5.3 (tui file manager)

— title: “Release nnn v5.3 Mai Tai · jarun/nnn” url: “https://github.com/jarun/nnn/releases/tag/v5.3 [https://github.com/jarun/nnn/releases/tag/v5.3]” — nnn v5.3 Mai Tai [https://en.wikipedia.org/wiki/Mai_Tai] release notes. - add native preview pane (P) with automatic .npreview support - fuzzy filtering improvements: - scoring, ranking, character arbitration - dimmed matches (works with string filtering also) - native prompt - cycle entries in the current directory with TAB - enter a directory that exactly matches the filter with / - support Alt-Esc to quit a context with or without an active filter - optimize ncurses rendering with leaveok() - lazy-load plugins when requested - disable linking libreadline by default; use make O_NORL=0 to enable it - show the runtime bookmarked directory path in the help menu - add O_BENCH to exit after startup for benchmark runs - add stats plugin to show complete file information in a pager - add tnp terminal note-pad plugin - add Kitty drag-and-drop support to dragdrop - plugin nmount improvements: - unmount all external USB partitions with u - fill prompt with last input on Up, clear on Down - clear stale Kitty graphics placements when closing video previews in preview-tui - use HOST_CC and HOST_CFLAGS when building the icons generator - fix shell quoting in preview-tabbed - fix context selection and active-tab handling when cycling contexts - fix selection-path unescaping during selection edits - reconcile off-screen selections correctly before inversion - do not automatically enter directories without read permission - add safety checks for session header fields - support escaping name completions in the native prompt - handle arbitrarily long paths when escaping shell arguments