[FD] 0022-multi-stake

[0xSol]

SIMD-0022 Add multistake proposal

• [ ] Solana protocol version
• [ ] List of feature gate links
• [ ] Priority
• [ ] Validator reviews

FireDancer implementation

• [ ] FD validator version
• [ ] FD PoC
• [ ] FD repo link
• [ ] Target testnet date
• [ ] Target mainnet date

[0xSol]

FD confirmed in this comment If implemented in BPF programs, no need for FD specific implementation