feat(collections): implement appmodule.HasGenesis interface

[julienrbrt]

Description

ORM implements the appmodule.HasGenesis interface, but collections not yet, it is only missing the app wiring methods of the interface. This PR adds support for it.

https://github.com/cosmos/cosmos-sdk/blob/0ce4990689002daa625208d4fd5e8b5186e4739c/core/appmodule/genesis.go#L10:L23

https://github.com/cosmos/cosmos-sdk/blob/6afece635cef9f8e044a04ce67d06e55ca300249/orm/model/ormdb/module.go#L215:L217

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[testinginprod]

if this is all which is needed then it looks good to me!

[julienrbrt]

if this is all which is needed then it looks good to me!

Not too sure yet, I am trying to implement it here: cosmosregistry/example#18, but getting some errors still.