Proto/Env: expose smart rollup hash types through environment

Alain Mebsoutrequested to merge
alain@functori@scoru-base-types-env into master

Context

This MR makes the notions of smart rollup commitment hash, PVM state hash, inbox hash and payload hash be common to all (future) protocols through the environment.

Manually testing the MR

Refactoring.

Edited by Alain Mebsout

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