strop v0.23.0

Escape is preserved at the terminal boundary (0048), and navigation
state becomes visible (0047): document symbols, the jumplist as a
picker, and mark cards that show the marks.

Fixed

• Escape could be lost on legacy terminals. Pressing Esc and typing
  immediately coalesced into one byte batch that crossterm decodes as
  Alt+key, and strop dropped the Alt bit — the mode never left Insert
  and the letters landed in the buffer. The terminal adapter now treats
  Alt as an Escape prefix consistently (strop has no Alt bindings):
  Escape, then the base key, in FIFO order. Capable terminals are
  additionally asked for unambiguous Escape encoding (kitty keyboard
  protocol DISAMBIGUATE_ESCAPE_CODES, popped idempotently on exit),
  and the CSI-u Control aliases (Ctrl-[/I/M) keep their legacy meanings.
  Verified on a real PTY: coalesced ESC hkl saves the typed text with
  the letters as Normal-mode motions.
• Code-action and symbol pickers whose items arrive after the initial
  ranking now re-rank — the list no longer renders empty until the
  first keystroke.
• Grep and symbol hits from a picker now record a jumplist entry
  (quickfix jumps enter the jumplist in vim), so Ctrl-O returns to
  where the picker was accepted — remote hits included.

Added

• Document symbols (0047 §1): Space s or :symbols opens the
  current file's symbols as a streaming picker — flat rows with the
  container path, kind and line; fuzzy-matches against the container.
  Both LSP reply shapes (hierarchical and flat) flatten to the same
  rows. Works over ssh:// through the workspace URI seam. Space S
  is reserved for workspace symbols.
• Jumplist picker (0047 §2): Space j or :jumps — vim :jumps
  as a menu: past newest-first, the current position marked, dead
  documents filtered; Enter jumps and records the spot for Ctrl-O.
• Mark cards (0047 §3): m, ' and ` which-key cards label
  the absorb key as a-z and list the live marks with their landing
  lines — for the jump cards the list is the menu.