KarpelesLab / outscript / 23687145067

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add comprehensive Solana support: v0 transactions, PDA, SPL tokens, priority fees, verification

- Fix NewSolanaTx to return error, validate account count (max 256)
- Add bounds checks in UnmarshalBinary for signature/account counts
- Add PDA computation (SolanaCreateProgramAddress, SolanaFindProgramAddress)
- Add instruction helpers: compute budget (priority fees), SPL token transfer,
  associated token account creation, durable nonce advance
- Add well-known program addresses (ComputeBudget, Token, ATA, sysvars)
- Add Verify() for Ed25519 signature verification on signed transactions
- Add versioned transaction (v0) support with address lookup tables:
  SolanaMessageV0, SolanaAddressTableLookup, NewSolanaTxV0
- Version-aware Sign/Verify/Marshal/Unmarshal dispatching

BREAKING: NewSolanaTx now returns (*SolanaTx, error) instead of *SolanaTx

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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