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/freemodel/no_balance.txt

@@ -0,0 +1,2 @@
+fe_oa_282086b9aae3c7ff2c94a2dd54328a31f33ff82527e2a79c|https://github.com/Abhishek-Gharat/-local-first-CRDT-based-sync/blob/df5a357a07798800e323628ba59a3024e550d43d/README.md
+fe_oa_31d97da4e6a143551c8080cefb494db0f75b6506bd1786d5|https://github.com/Raj-nimase/docFoge/blob/894b25dc54aaffadc43a4483175c7f5f5fa81695/.claude/settings.json