feat: add svm crate - #21
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What changed
Customized the imported
solana-svmbaseline into the engine's caller-ownedtransaction loader and executor, and patched it into the workspace.
Why
Persistence and commit policy must remain above transaction execution rather
than inside validator-owned bank state.
Closes #8.
Impact
transaction_processing_callbackand returns the mutated account set after execution.
and
PROGRAM_OWNERSownership.surfaces that are outside this engine boundary.
Reviewer notes
Rent-state and lamport-balance checks still surround execution, but this runtime
owns no validator state. The fork constraints are documented in
solana/README.md.Follow-up
processorschedules transactions through this SVM later in the stack.