PHA staking in vault on 1click


Hi, Phala network provides one of the best APY for staking, ~90% currently
Choosing wisely the pool or a vault is an important part of the staking process,
But delegating PHA tokens could be simplified for users in the same way it's done with DOT in Talisman with nomination pools one click staking, Talisman could propose a vault and let the user make another choice if he wants
Staking is now autocompound so we don't need a claim rewards function, just a delegate and a withdrawal function