feat: distinct go modules for all state machine modules #3787
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Unblocks #3729
Description
One of the issues encountered when working on the multi-app prototype is that protobuf definitions get registered multiple times (once per state machine imported into the multiplexer). This results in errors like:
To resolve, this PR introduces distinct Go modules per state machine module. This enables the v2 and v3 state machine to import the exact same module (i.e.
github.com/celestiaorg/celestia-app/x/blob
) which will result in just one proto type being registered per actual type.