feat: add syft-verifuscate package for verify-then-obfuscate of enclave model code

[rasswanth-s]

Summary

• New workspace package syft-verifuscate: verify-then-obfuscate for JAX/Flax model-inference code that runs in an enclave on a second party's private data
• verifuscate.run(...) statically verifies that private model-definition lines only do trusted JAX/Flax math (no imports, file/network access, or dynamic-Python escape hatches), then obfuscates them (rename identifiers, blank constants, strip comments) so the model architecture stays secret
• Also exposes verify(...) (check only, returns violations) and obfuscate(...); strict=False returns a RunResult instead of raising PolicyViolation
• Registers the package in the root workspace and test extras

Test plan

• uv run pytest packages/syft-verifuscate/tests/ — 18 tests pass
• pre-commit run --all-files passes