feat(x/ecocredit): add minimal basket proto (#731)

* feat(x/ecocredit): add minimal basket proto

* updates

* updates

* add BasketClass table

* codegen

* switch duration to window into past

* add batch start date index

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/tx.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/tx.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/tx.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1alpha1/state.proto

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>

* updates

* Update proto/regen/ecocredit/basket/v1alpha1/tx.proto

Co-authored-by: Cory <cjlevinson@gmail.com>

* docs

* update state.proto

* docs

* codegen

* docs

* docs

* update to v1

* add basket creation fee

* Update proto/regen/ecocredit/basket/v1/state.proto

Co-authored-by: Robert Zaremba <robert@zaremba.ch>

* add comment

* fee comment

Co-authored-by: Tyler <48813565+technicallyty@users.noreply.github.com>
Co-authored-by: Cory <cjlevinson@gmail.com>
Co-authored-by: Robert Zaremba <robert@zaremba.ch>