feat(chain): add robinhood support; disable monad/megaeth/hyperevm/tron

Add robinhood as a supported chain across the CLI and skills, and stop
advertising chains that are not publicly supported yet.

robinhood:
- validate.ts: add to VALID_CHAINS and treat as EVM for address checks
- reject guards for commands that do not support it: track kol,
  track smartmoney, cooking create (mirrors market signal)
- --chain help updated for supported commands (token/portfolio/swap/
  market kline·trending·trenches·hot-searches/track follow-*/order get/
  gas-price); OpenApiClient chain comment
- docs: all SKILL.md, Readme.md, Readme.zh.md (split-out row for
  unsupported commands), cli-usage.md, plugin/marketplace descriptions

disable monad/megaeth/hyperevm/tron:
- comment monad out of VALID_CHAINS (kept for quick re-enable)
- strip these chains from all --chain help, SKILL.md, cli-usage.md
  (hot-searches default now 4 chains: sol/bsc/base/eth)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/commands/cooking.ts

@@ -81,6 +81,10 @@ export function registerCookingCommands(program: Command): void {
         process.exit(1);
       }
       validateChain(opts.chain);
+      if (opts.chain === "robinhood") {
+        console.error(`[gmgn-cli] cooking create does not support robinhood, got "${opts.chain}"`);
+        process.exit(1);
+      }
       const params: CreateTokenParams = {
         chain: opts.chain,
         dex: opts.dex,