[Feature Request] Make editor keybindings configurable and respect EDITOR/VISUAL environment variables

Bug Description
C-g edit with vim, please allow the key combinations to be configurable M-p M-t C-g and allow defaulting to EDITOR / VISUAL for the editor

Environment Info

• Platform: linux
• Terminal: xterm-256color
• Version: 2.1.90
• Feedback ID: fbb0ce00-b6b6-4705-878e-786554d14097

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/david/.local/share/claude/versions/2.1.90 (expected in multi-process scenarios)\n    at hu$ (/$bunfs/root/src/entrypoints/cli.js:1892:2138)\n    at bQ8 (/$bunfs/root/src/entrypoints/cli.js:1892:1218)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-02T11:27:07.598Z"}]