Implement Example Program Using Ed25519 Signature Verification

[anthonyliriano]

We need an example program that demonstrates how to use the Ed25519 signature verification to spend custodied funds. This example should serve as a reference for developers looking to integrate Ed25519 signature verification into their Solana Program, particularly in the context of managing and spending custodied funds.

[ngundotra]

Good examples to draw on for an example program:

https://github.com/deanmlittle/anchor-dice-2023

https://github.com/jito-foundation/stakenet/blob/f86e28b033b2d7dbc92e4ea488fc682c34271240/programs/validator-history/src/instructions/copy_gossip_contact_info.rs#L57

[lenquadica]

Alright on it gimme eh 15 min