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>

skills/gmgn-track/SKILL.md

@@ -59,7 +59,9 @@ Use the `gmgn-cli` tool to query on-chain tracking data based on the user's requ
 
 ## Supported Chains
 
-`sol` / `bsc` / `base` / `eth`
+`sol` / `bsc` / `base` / `eth` / `robinhood`
+
+Note: `track kol` and `track smartmoney` do **not** support `robinhood` — they accept `sol` / `bsc` / `base` / `eth` only.
 
 ## Prerequisites
 
@@ -130,7 +132,7 @@ gmgn-cli track smartmoney --chain sol --side sell --limit 10 --raw
 
 | Option | Description |
 |--------|-------------|
-| `--chain` | Required. `sol` / `bsc` / `base` / `eth` |
+| `--chain` | Required. `sol` / `bsc` / `base` / `eth` / `robinhood` |
 | `--wallet <address>` | Required. Wallet address to query |
 | `--group-id <id>` | Filter by group: `all_group` (all tokens across groups), `default` (default group), or a user-defined group ID |
 | `--interval <interval>` | Time interval for price change stats (e.g. `1m`, `5m`, `1h`, `6h`, `24h`) |
@@ -172,7 +174,7 @@ Each item in `followings` contains:
 
 | Option | Description |
 |--------|-------------|
-| `--chain` | Required. `sol` / `bsc` / `base` / `eth` |
+| `--chain` | Required. `sol` / `bsc` / `base` / `eth` / `robinhood` |
 | `--wallet <address>` | Required. Wallet address to query |
 
 ## `track follow-token-groups` Response Fields
@@ -190,7 +192,7 @@ Each item in `followings` contains:
 
 | Option | Description |
 |--------|-------------|
-| `--chain` | Required. `sol` / `bsc` / `base` / `eth` |
+| `--chain` | Required. `sol` / `bsc` / `base` / `eth` / `robinhood` |
 | `--wallet <address>` | Filter by wallet address |
 | `--limit <n>` | Page size (1–100, default 10) |
 | `--side <side>` | Trade direction: `buy` / `sell` |