feat(mimo): add ai-mimo launcher for Xiaomi MiMo V2.6 Pro

ai-mimo runs Claude Code through Xiaomi's Anthropic-compatible API
(Token Plan or pay-as-you-go). The key's endpoint is found by probing
token-plan-sgp, token-plan-ams and api.xiaomimimo.com (a key only works
in its own region) and is saved to mimo_base_url; MIMO_BASE_URL
overrides. Unreachable endpoints are skipped, token-plan-cn is left out
of the probe since it times out from our network, and a 402 on the
pay-as-you-go endpoint explains that a tp- Token Plan key is needed.

Always the smartest model: mimo-v2.6-pro in every slot and for
subagents, --model opus and --effort max on each start, 128000 output
tokens (Claude Code's ceiling), real 1M context window. Measured on
13.10: MiMo ignores output_config.effort (even "bogus" is accepted, no
length trend from low to max) and treats thinking adaptive like
enabled, so reasoning is always on; EFFORT_MAPPING.md records this.

/logout-mimo is registered as a command and handled by the logout hook
(removes mimo_key and mimo_base_url). 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>

setup.sh

@@ -230,7 +230,7 @@ case "$choice" in
     fi
 
     echo -e "${BLD}AI инструменты:${CLR}"
-    for cmd in ai-claude ai-gpt ai-deepseek ai-kimi ai-glm ai-eltex ai-eltex-qwen ai-openrouter ai-opencode ai-gemini android; do
+    for cmd in ai-claude ai-gpt ai-deepseek ai-kimi ai-glm ai-eltex ai-eltex-qwen ai-mimo ai-openrouter ai-opencode ai-gemini android; do
       if command -v "$cmd" &>/dev/null; then
         echo -e "  ${GRN}✓${CLR} $cmd"
       else
@@ -241,7 +241,7 @@ case "$choice" in
     echo ""
     echo -e "${BLD}API ключи:${CLR}"
     cfg="$HOME/.config/ai-setup"
-    for f in deepseek_key kimi_key glm_key eltex_key eltex_qwen_key openrouter_key opencode_key; do
+    for f in deepseek_key kimi_key glm_key eltex_key eltex_qwen_key mimo_key openrouter_key opencode_key; do
       name="${f/_key/}"
       if [ -s "$cfg/$f" ]; then
         echo -e "  ${GRN}✓${CLR} $name"
@@ -252,7 +252,7 @@ case "$choice" in
 
     echo ""
     echo -e "${BLD}API доступность:${CLR}"
-    for entry in "Anthropic:api.anthropic.com" "DeepSeek:api.deepseek.com" "OpenAI:api.openai.com" "Kimi:api.kimi.com" "GLM:api.z.ai" "OpenRouter:openrouter.ai" "OpenCode:opencode.ai"; do
+    for entry in "Anthropic:api.anthropic.com" "DeepSeek:api.deepseek.com" "OpenAI:api.openai.com" "Kimi:api.kimi.com" "GLM:api.z.ai" "MiMo:api.xiaomimimo.com" "OpenRouter:openrouter.ai" "OpenCode:opencode.ai"; do
       _name="${entry%%:*}"
       _host="${entry##*:}"
       _ms=$(curl -s -o /dev/null -w "%{time_connect}" --max-time 5 "https://$_host" 2>/dev/null)