[SIP-013] Make STRDY transferable.

It should be clear by now that making STRDY transferable is necessary to attract TVL and new users. After a month, v2 could only attract $5m and 95 users. Distributing STRDY without transferability has proven to be a waste of resources for a second time. v1: https://defillama.com/protocol/sturdy v2: https://dune.com/x3research/sturdy