feat: add program runtime crate - #20
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What changed
Customized the imported
solana-program-runtimebaseline for mapped accountregions and patched the crate into the workspace.
Why
The engine needs invocation state, CPI translation, and SBF VM setup that map
account data directly into the VM instead of threading it through a serialized
input buffer.
Closes #9.
Impact
logging, and the program cache needed by the engine.
MemoryRegions while preservingloader-selected ABI formats.
boundary.
Reviewer notes
Serialization and VM error remapping must stay aligned with the
transaction-context access-violation handler. The boundary is documented in
solana/README.md.Follow-up
svmdrives this customized runtime in the next PR.