Add Aider parser

[khadinakbarlabs]

Tool

Aider — terminal AI pair-programmer. One of the most-installed AI coding CLIs.

What we'd need

Find where Aider persists per-session token data, then parse tokens sent: N / tokens received: N + model name per turn — same shape as the existing parsers in src/cli.js. Never read the prompt or response body — only tokens + model.

Likely locations

• ~/.aider.chat.history.md (global) and per-repo .aider.chat.history.md
• ~/.aider/ directory
• ~/.aider.input.history

A regex over the chat history file is probably enough for v1.

Acceptance

• New entry in the source registry inside src/cli.js.
• Returns { source: "aider", model, input_tokens, output_tokens, cost_usd?, synced_at } per session/day.
• README updated with the file path it reads.
• Honest caveats note if cost isn't available on subscription tiers.

Tag the PR with parser and mention this issue.