feature: fixed fee for active contracts with no consumption

[muhamadazmy]

In certain situations, people can create contracts that is not actually tight with any active deployments. Or a deployment that doesn't generate any consumption (like a network deployment).

Those people can just move on without cleaning up their un-used (0 consumption) contract and the chain (and the node) will think it has an active contract forever (this will always show up as active on the grid forever)

A good solution for this, an active contract with no consumption can be billed on it's billing cycle a fixed small fee (think 0.05 tft) so eventually either the user will have to make sure he has NO active (unused) contracts. or will eventually run out of funds and his contract will be decomissioned automatically.

This will also making creating network workloads not free of charge.