feat: add Robinhood STANDARD token asset

[sethhrbek]

Summary

Adds the STANDARD token logo on Robinhood Chain so cold loads stop 404ing on the deterministic asset path.

blockchains/robinhood/assets/
└── 0x88ad8DdF1E3898412146a534538d418c6F8A9062/
    ├── info.json   (name/symbol/type/decimals/id — same minimal shape as USDG/WETH)
    └── logo.png    (256x256 PNG, 3.3 KB)

Context: the token launched 2026-09-14 and has no CoinGecko coin page yet, so the backend returns project: {} and the TDP header falls back to the symbol badge. https://app.uniswap.org/explore/tokens/robinhood/0x88ad8ddf1e3898412146a534538d418c6f8a9062

Test plan

• Verified name, symbol and decimals against the contract over the public Robinhood RPC (STANDARD / STANDARD / 18)
• Logo is the project mark published on DexScreener for this contract; it matches the favicon on the project site (standardreserve.xyz)
• file reports a 256x256 PNG, within the checker's 128–512 square limit
• make check: 367 errors on master, 368 on this branch. The one new error is missing required fields: description, website, explorer, status, identical to the existing Robinhood USDG/WETH entries (the checker has no explorer template for this chain, so a fully populated info.json fails a different rule instead)

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