fix(cli): adopt DA1 sandwich technique for robust OSC color query detection

Replace ad-hoc environment checks (CI, Warp, tmux, Docker) with a
comprehensive `is_osc_query_unsupported()` pre-screen modelled after
`terminal-colorsaurus`, and implement the DA1 sandwich technique to
detect unsupported terminals at runtime without waiting for timeouts.

Key changes:
- Centralized quirks detection covering CI, Docker, devcontainers,
  Kubernetes, Emacs, GNU Screen, Eterm, tmux, and TERM=dumb
- DA1 sentinel query appended after OSC queries; if its response
  arrives first the terminal doesn't support OSC and we bail immediately
- drain_da1() consumes the trailing DA1 response to prevent leaks
- BEL terminator instead of ST to work around urxvt response bug
- SSH-aware timeout (1000ms vs 200ms local)
- Ported regression test from terminal-colorsaurus issue #38
- Extended test coverage for parsing edge cases

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Brooooooklyn