Implement `claim` module

[lumtis]

Initial implementation for claim module

Tasks

• [x] https://github.com/tendermint/spn/issues/782
• [x] https://github.com/tendermint/spn/issues/783
• [x] https://github.com/tendermint/spn/issues/784
• [x] https://github.com/tendermint/spn/issues/785
• [x] https://github.com/tendermint/spn/issues/834
• [x] https://github.com/tendermint/spn/issues/835
• [x] https://github.com/tendermint/spn/issues/851
• [x] https://github.com/tendermint/spn/issues/861
• [x] https://github.com/tendermint/spn/issues/862