* Add basic savings strategy
Supports ukava
* Use clearer error message for ErrInvalidVaultStrategy
* Add invariants
* Separate specific vault/all vaults query, update depositor inconsistencies
* Update swagger
* Use single bkava AllowedVault for all bkava variants
* Do not use allowedVault.Denom for value
* Fix vault balance query
* Update query to list bkava vaults
* Add vaults query doc
* Update grpc query test with no supply
* Add earn hooks
* Handle errors
* Update outdated doc comments, make getAllowedVault_Raw private
* Fix outdated comments, lints
* Fix comment maths
* Use AccAddressFromBech32 to validate message addresses
* Simplify strategies to lend and savings
* Add hard and savings keepers
* Add ctx to strategy interface, fill in lend strategy
* Rename lend strategy to hard
* Fix hard deposit query, fix withdraw bank send
* Fix misleading borrow instead of withdraw for hard
* Remove liquidateall strategy method
* Withdraw tests
* Add hard gs to testutil suite
* Update withdraw tests with working hard strategy, clean strategy interface methods
* Check allowed denom for strategy
* Update GetVaultTotalValue doc note
* Update error wrap message for unsupported denom
* Remove unnecessary viewvault keeper
* Withdraw amount from account value, not supplied value
* Test value > supplied withdraw
* Use dec when dividing for withdrawAmountPercent
* Use the correct store prefix for vault shares
* Update swap references to earn
* Simplify vault shares, use a single share for all coins per address
