feat(qwen): add ai-qwen launcher for Alibaba Token Plan (Qwen3.8)

ai-qwen runs Claude Code through Alibaba Cloud Model Studio's
Anthropic-compatible Token Plan endpoint
(token-plan.ap-southeast-1.maas.aliyuncs.com/apps/anthropic). The shared
key is built into the generated script, so it starts right away without
asking for a key.

qwen3.8-max (the smartest model the key has) is in opus/sonnet and for
subagents, --model opus on each start; qwen3.8-flash is in haiku for
background tasks. Measured on 20.10: both models accept up to 983616
input tokens (CLAUDE_CODE_MAX_CONTEXT_TOKENS=1000000, autocompact fires
before the API limit) and see images. Qwen validates
output_config.effort (bogus -> 400), Max shows no trend from low to
max, Flash thinks ~2x longer on max; the launcher starts on --effort max
like ai-mimo, EFFORT_MAPPING.md records the measurements.

setup.sh status, statusline brand color, README, QUICK_START and
AGENTS.md list the new launcher.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

home-configs/claude/statusline-command.sh

@@ -40,6 +40,7 @@ _brand_color() {
     kimi)       printf '\033[38;5;81m' ;;   # Kimi голубой
     glm)        printf '\033[38;5;223m' ;;  # Z.ai кремовый (бренд-фон z.ai, #FFE4B5)
     mimo)       printf '\033[38;5;202m' ;;  # Xiaomi оранжевый (#FF6900)
+    qwen)       printf '\033[38;5;99m' ;;   # Qwen фиолетовый (#615CED)
     openrouter) printf '\033[38;5;135m' ;;  # OpenRouter фиолетовый
     *)          printf '\033[38;5;223m' ;;  # кремовый (fallback)
   esac