Change in staking structure fees

I propose to reduce the staking fees for turtles to 5k SHL instead of 15k. At the same time, I propose to implement unstaking fees of 10k SHL. From those 10k unstaking fees, 50% of it could be burn.

-OPT 1 : NO CHANGE - 15k staking fees - 0 unstaking fees -OPT2: 7.5k staking fees - 7.5k unstaking fees -OPT3: 5k staking fees - 10k unstaking fees