* feat: add community multi-spend proposal type
* feat: add handler for community multi-spend proposals
* chore: register new community multi-spend proposal
* feat: define client for community multi-spend proposal
* fix typos in example cli json
* fix: register now proposal type with module codec
* fix: register community multi-spend proposal with gov router, not committee
* fix: define kavadist keeper before referencing it
* nit: include deposit in example proposal
* nit: update comment
* nit: fix error codes
* nit: update comments