feat: Add constitution to genesis state

[faddat]

Description

Closes: numerous existential debates

"but what is it for?!", asked the masses, of the highly repurposable state machine.

Well, till just now, there really wasn't any clear direction to blockchains built with the
cosmos-sdk.

The role of validator remained... difficult to define.

The purpose of chains remained... according to some -- intentionally unclear.

Never, fear, the constitution is here! For classic mode, just leave it "" in your genesis.json,
and float adrift without purpose. The constitution is intentionally immutable at this time, it
is another factor that the validators assent to when they begin to sign at genesis and bring the
chain to life:

Purpose, direction, a solid foundation. We need these things.

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Author Checklist

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• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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• updated the relevant documentation or specification
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Reviewers Checklist

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• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[julienrbrt]

We cannot change all the field numbers because it is proto breaking.
We can simply add that field at the bottom of the proto message.

[faddat]

Thanks @julienrbrt -- I was wondering about the right way to do it <3

[tac0turtle]

I think this needs a discussion there are some things that come to mind that this doesn't cover. Namely, how does a community member propose changes to the constitution? right now it looks to be a chain migration. Secondly how does this differ from a text proposal on chain that is named constitution, it holds the same value as this(?)

[tac0turtle]

lets open an issue or discussion on this topic and close the PR till we have a clear understanding of how this feature should be added to the cosmos-sdk. @faddat could you open a discussion or issue on this?

[faddat]

Yeah, totally. I'm going to finish getting it squared away, but the idea is that just like genesis state generally, the people making the chain create the constitution, and it's immutable. Amendment=fork.