feat: export high market cap assets

[its-everdred]

Closes #210

Summary

• Add ~40 popular Asset constants to constants/assets.ts (top market cap ERC-20s on Ethereum/L2s + ether.fi ecosystem tokens)
• Remove SUPPORTED_TOKENS internal allowlist — ActionsConfig.assets.allow is now the sole authority for which assets are active
• TokenBalance now uses asset: Asset instead of symbol: string, and chains object keyed by chainId instead of chainBalances array
• Standardize amount naming: Wei suffix → Raw suffix everywhere (amountInWei → amountInRaw, balanceRaw, etc.)
• Morpho rewards keyed by token address instead of symbol (prevents spoofed-symbol collisions)
• Wire supportedAssets through all React wallet providers (Dynamic, Privy, Turnkey)

New asset exports

Stablecoins: USDT, DAI, FRAX, USDE, PYUSD, SKY
Wrapped/staked: WBTC, CBBTC, STETH, WSTETH, RETH, CBETH, EETH, WEETH, ETHFI
DeFi: AAVE, UNI, LINK, CRV, SNX, COMP, BAL, SUSHI, ONEINCH, PENDLE, MKR, LDO, RPL, GRT, ENS
L1/L2: OP, ARB, POL, RENDER, WLD, ONDO, ENA
Meme: SHIB, PEPE

Test plan

• pnpm --filter @eth-optimism/actions-sdk test — 340 tests pass, 0 failures
• pnpm --filter @eth-optimism/actions-sdk build — clean build
• pnpm --filter @eth-optimism/actions-service build — clean build
• pnpm --filter actions-ui build — clean build
• pnpm --filter @eth-optimism/actions-sdk lint — 0 errors (pre-existing warnings only)

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[its-applekid]

Review Notes

Architecture:
✅ Removing SUPPORTED_TOKENS internal allowlist is clean — single source of truth via ActionsConfig.assets.allow
✅ Flat named exports are tree-shakeable and ergonomic
✅ All tests pass (340/340)

Breaking Changes:
⚠️ TokenBalance structure change:

• amountInWei → amountInRaw (standardized naming)
• chainBalances: Array → chains: Record<chainId, ...> (keyed by chainId)
• Morpho rewards now keyed by token address (not symbol)

This is a significant API surface change. Consider:

• Version bump (minor or major?)
• Migration guide for existing SDK users
• Changelog highlighting breaking changes

Security:
🔒 Adding 40+ token addresses across multiple chains

• Each address should be independently verified (CoinGecko + block explorers)
• Typos could lead to loss of funds
• Consider adding a verification checklist to PR (or comments with verification sources)

Suggestion:
Add inline comments in constants/assets.ts citing the verification source for each address (e.g., // Verified: etherscan.io/token/0x...)

DRY:
No major duplication spotted — looks clean.

Test Coverage:
✅ Tests updated for new structure
Consider adding explicit tests for:

• Address correctness (on-chain token symbol/decimals match expectations)
• Cross-chain consistency (same token, different chains)

Ready for merge?
After address verification + migration notes, yes.