Add LLM key-hunter toolkit, vault, and skill

- tools/scripts/llm-key-hunter: GitHub leak hunting pipeline (hunt_*,
  pivot miner, two-layer verify/content caches, per-provider verification)
- usable_keys: verified key vault across 12 providers (deepseek, minimax,
  volcanoark, longcat, codingplan, zhipu free-tier, mimo, siliconflow, etc.)
- .grok/skills/llm-key-hunter: operator skill for the hunt/verify/vault flow
- NewAPI channel import scripts and CDP capture helpers
- Result verdict buckets (excluding multi-GB blob caches and dedup dumps)

tools/scripts/llm-key-hunter/results/kimi/recheck_balanced.txt

@@ -0,0 +1,3 @@
+sk-SMoGgZPRoc0eAeREJZzbfeBm29jsKACBJh50BDFtKSdHHMFG|https://github.com/glide-the/InterpretationoDreams/blob/fea63847b15af6e648523c79d1a519cffb57284d/.vscode/launch.json|CNY 240.0000
+sk-3V55tq2xwso8dhE4vFI5X9MssR6Y0Uw1BCkIUnGAP9f5dMo8|https://github.com/caoyuanyuan-glitch/smart-doc-platform/blob/f5ffae0a2171094eeeeed0ae5b9a49511102a3a9/backend/runtime.env|CNY 9.9997
+sk-fAxXNDTxENRTP8Zmf8VBKZdUj2Vf8egybKoPrDnAZOnVLFxt|https://github.com/JYXXMISILE/zhinengduihuazhushou/blob/f935597fcf09fde5940f2a6cd0c7104d2f560ca7/server/.env|CNY 0.0141