Add decimals and token name to token

[LHerskind]

The current token that we are using as our standard don't include decimals, symbol nor name as the ERC20 often see (some optional). These should be included as immutables in the contract and have getters such that it can easily be read both from private and public for better composability with DeFi contracts which might need to read these (decimals often used when matching precision between tokens etc).