* Use cosmossdk.io/errors for deprecated error methods
* Update error registration with cosmossdk.io/errors
* Use cosmossdk.io/math for deprecated sdk.Int alias
* Fix modified proto file
* Update sdk.Int usage in swap hooks
* Update e2e test deprecated method usage
* define and generate proto types
* implement savings claim msg + test
* implement savings claim + test
* register msg and add store keys
* implement savings claim keeper methods
* update function comment
* define and generate proto types, update types dir
* update gen state with savings + test
* update legacy test data for ci test
* update proto types numbering
* update params proto types numbering