feat: Add FaultProofFixture definition

[BrianBland]

Description

Adds a new FaultProofFixture type definition, which is intended to provide all of the data required to execute an offline fault proof test

Tests

Added basic serialization/deserialization roundtrip tests

Additional context

Add any other context about the problem you're solving.

Metadata

• Fixes #[Link to Issue]

[clabby]

Looks good at a high level. Changes in the FPP status; I didn't enumerate the full list for you (missed unfinished) on discord.

Should also probably add a TryFrom<u8> for FaultProofStatus.

[clabby]

Suggested change

	/// The fault proof status is the result of executing the fault proof program.
	#[derive(Serialize, Deserialize, Debug, Default, PartialEq, Eq)]
	pub enum FaultProofStatus {
	/// The claim is valid.
	#[default]
	Valid,
	/// The claim is invalid.
	Invalid,
	/// Executing the program resulted in a panic.
	Panic,
	/// The status is unknown.
	Unknown
	}
	/// The fault proof status is the result of executing the fault proof program.
	#[derive(Serialize, Deserialize, Debug, Default, PartialEq, Eq)]
	#[repr(u8)]
	pub enum FaultProofStatus {
	/// The claim is valid.
	#[default]
	Valid = 0,
	/// The claim is invalid.
	Invalid = 1,
	/// Executing the program resulted in a panic.
	Panic = 2,
	/// The program has not exited.
	Unfinished = 3,
	/// The status is unknown.
	Unknown
	}

[BrianBland]

Thanks 👍, will iterate on this a bit more as I wire this up to the op-program.

[refcell]

Added you as a collaborator btw @BrianBland so you don't need if a fork if you don't want :)