Set messages' fees interactively

[jennijuju]

To avoid unexpected high gas cost for a message or low gas fees that prevents messages from being landed onchain, design a more user interactive cmds for pushing messages. For example(from @raulk): Lotus could offer configurable "fee tiers", with potentially 3 tiers by default: e.g. aggressive, standard, frugal. Users could create custom tier policies in their config.toml. When submitting a transaction, a user could specify the name of the tier they want to use. The client would then calculate the fee cap and premium accordingly using the base fee of the last tipset (and potentially of the previous N tipsets to calculate a projection of where the basefee could go), and the current state of the mpool.

[jennijuju]

closed by #5936