libghidra v0.0.3

- Add project file lifecycle APIs (ImportProgram, OpenProject,
  CloseProject, ListProjectFiles); new examples list_project_files
  and switch_active_program
- Track program changes via native Ghidra modification metadata
  (replaces synthetic revision tokens)
- Harden local variable mutation path; guard decompiler local mutation
  storage
- Fix headless drain (Python) and Rust local linking (build.rs)
- Track Ghidra callotherfixup userop patch
- Bump VERSION/Cargo to 0.0.3; refresh Cargo.lock

v0.0.2 — install runbook + README polish

- Rust local backend parity with the Python wheel
- libbfd ABI bundling for offline decompilation
- glibc ≥ 2.36 link fixes
- New install-prompt.md (AI-agent runbook with verification gates)
- README bump to 0.0.2