feat: add Stonk.Fi token metadata and icon

[franciskim]

Summary

Adds metadata and the official square SVG icon for Stonk.Fi (STONKFI) on Robinhood Chain.

• CAIP-19 asset ID: eip155:4663/erc20:0xBD4802d70448fb1D776683bebEa592d66B623e29
• Token type: ERC-20 (not ERC-721 or ERC-1155)
• Name: Stonk.Fi
• Symbol: STONKFI
• Decimals: 18

Project and asset verification

• Official project website identifies the exact STONKFI contract address, Robinhood Chain, and chain ID 4663.
• Official protocol documentation explains the Stonk.Fi protocol and lists its deployed contracts, including STONKFI.
• Blockscout token page confirms the ERC-20 name, symbol, 18 decimals, and on-chain holder/transfer activity.
• Verified contract source is published on Robinhood Chain Blockscout.
• Official logo source is served by the project domain. It is a square, pure-vector SVG with no embedded raster images, scripts, external references, CSS, or filters, and its mark matches the logo used on the official homepage.

Validation

• npm run asset:verify -- --caip "eip155:4663/erc20:0xBD4802d70448fb1D776683bebEa592d66B623e29"
• node buildindex.js
• yarn test — 702/702 tests passed on Node 20

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Note

Low Risk
Additive asset metadata and icon only; no application logic or security-sensitive code changes.

Overview
Registers Stonk.Fi (STONKFI) as a new Robinhood Chain ERC-20 asset under CAIP-19 eip155:4663/erc20:0xBD4802d70448fb1D776683bebEa592d66B623e29.

The PR adds a metadata entry (name, symbol, 18 decimals, erc20: true) and a linked square SVG icon in the repo’s standard metadata/ + icons/ layout for chain 4663.

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