Fetch EVM balances, make everything generic over EVM chain, v2 schema fixes (#3962)

- **feat(app2): add balances evm**
- **refactor(app2): better schema, better balances**
- **feat(app2): fetch a balance**
- **feat(app2): fetch all sepolia balances**
- **feat(app2): fetch all evm balances**
- **feat(app2): show token errors**
- **fix(app2): evm balance fetching**
- **feat(app2): use v2_chains**
- **feat(app2): add chain.toViemChain()**
- **feat(app2): fetch balances for all evm chains, also significant
cleanup**
- **feat(app2): generic over evm chain**
- **chore(app2): fmt**