Modify API to handle also ERC20 tokens.
Modify community_tokens table - keep supply as string since string is easly convertible to bigint.BigInt.
Use bigint.BigInt for supply functions and fields.
Issue #11129
- Add ERC20 contract
- Add decimals field to community_tokens db table
- Adjusting API to handle assets deployment
- Add decimals field to CommunityTokenMetadata
Issue #10987