[Feature Request] Display context window consumption breakdown with `/context` command

[oscaromsn]

Bug Description feature: show files that's consuming the context window when sending /context

Environment Info

• Platform: darwin
• Terminal: zed
• Version: 2.1.6
• Feedback ID: 8a303519-fe6d-47e2-b653-c10e2cc3aec8

Errors

[{"error":"AbortError: The operation was aborted.\n    at unknown\n    at abortChildProcess (node:child_process:935:42)\n    at onAbortListener2 (node:child_process:35:24)\n    at abort (unknown)\n    at <anonymous> (/$bunfs/root/claude:5055:5777)","timestamp":"2026-01-13T21:16:03.584Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"prompt is too long: 206476 tokens > 200000 maximum\"},\"request_id\":\"req_011CX65KrEmpeWrPdMU4CQJZ\"}\n    at generate (/$bunfs/root/claude:440:33630)\n    at makeRequest (/$bunfs/root/claude:872:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-13T21:19:26.055Z"},{"error":"Error: {\"message\":\"Operation timed out.\",\"originalLine\":\"204\",\"originalColumn\":\"109420\",\"line\":\"204\",\"column\":\"109420\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Operation timed out.\\n    at <anonymous> (/$bunfs/root/claude:204:109420)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:2682:25028)\n    at <anonymous> (/$bunfs/root/claude:204:38555)\n    at wW$ (/$bunfs/root/claude:204:39099)\n    at <anonymous> (/$bunfs/root/claude:205:16930)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-13T21:44:24.709Z"}]