currently bostrom mint $H on every staking operation automatically
burn happens also automatically when neuron during unstake operation
that fact create serious confusion for avatars
and blur the line between staking and staking loans
however these systems must be completely independent
to overcome this lets add two explicit methods in protocol
by doing so we gain atomic functional unit for value extraction
we suggest to add new token to simplify implementation: $STL
$STL is short for staking loan position
suggested that $STL will be minted automatically the same way current $H is minted
in order to remove complexity and free margin trade $STL must be non transferable
fixed fee on H burn discussing extension of this idea