[Feature Request] Add customizable escape sequence for vim mode, ideally a vimrc

Bug Description
request kj escape sequence for vim mode. Due to muscle memory, vim mode is basically unusable for me without the ability to set a customized escape sequence.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.15
• Feedback ID: ca703176-6e53-4932-9504-40e9246fca85

Errors

[{"error":"Error: ENOENT: no such file or directory, scandir '/Library/Application Support/ClaudeCode/.claude/skills'\n    at readdirSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:1903)\n    at AW (/$bunfs/root/claude:11:34882)\n    at readdirSync (/$bunfs/root/claude:12:1864)\n    at hGR (/$bunfs/root/claude:1482:380)\n    at hGR (/$bunfs/root/claude:1482:1350)\n    at <anonymous> (/$bunfs/root/claude:1482:4440)\n    at <anonymous> (/$bunfs/root/claude:1482:5171)\n    at A (/$bunfs/root/claude:11:7245)\n    at iq8 (/$bunfs/root/claude:4125:4342)\n    at async <anonymous> (/$bunfs/root/claude:5413:2332)","timestamp":"2026-01-22T19:52:20.463Z"},{"error":"Error: ENOENT: no such file or directory, scandir '/Users/drewwinget/.claude/skills'\n    at readdirSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:1903)\n    at AW (/$bunfs/root/claude:11:34882)\n    at readdirSync (/$bunfs/root/claude:12:1864)\n    at hGR (/$bunfs/root/claude:1482:380)\n    at hGR (/$bunfs/root/claude:1482:1350)\n    at <anonymous> (/$bunfs/root/claude:1482:4483)\n    at <anonymous> (/$bunfs/root/claude:1482:5171)\n    at A (/$bunfs/root/claude:11:7245)\n    at iq8 (/$bunfs/root/claude:4125:4342)\n    at async <anonymous> (/$bunfs/root/claude:5413:2332)","timestamp":"2026-01-22T19:52:20.463Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/drewwinget/.local/share/claude/versions/2.1.15 (expected in multi-process scenarios)\n    at eZR (/$bunfs/root/claude:3243:2091)\n    at cFA (/$bunfs/root/claude:3243:1202)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-22T19:52:20.496Z"},{"error":"Error\n    at DP (/$bunfs/root/claude:42:1143)\n    at <anonymous> (/$bunfs/root/claude:47:10084)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:49:2147)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-22T19:52:20.614Z"},{"error":"Error\n    at DP (/$bunfs/root/claude:42:1143)\n    at <anonymous> (/$bunfs/root/claude:47:10084)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:49:2147)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-22T19:52:21.860Z"}]