Rename all 9 Rust crates from navigator-* to openshell-* to align
with the project rename to OpenShell. This is a comprehensive rename
touching ~1400 references across ~220 files:
- Crate directories and Cargo.toml names/deps
- Proto files (navigator.proto -> openshell.proto), packages, service name
- All Rust source imports (navigator_ -> openshell_) and string literals
- OPA Rego policy package name
- Python proto files and all SDK/e2e imports
- Dockerfiles, CI workflows, build scripts, task files
- Agent skills, documentation, and agent memory files
- Filesystem paths, CLI flags, K8s resource names, TLS cert subjects,
HTTP headers, gRPC paths
Binary names updated: navigator-server -> openshell-server,
navigator-sandbox -> openshell-sandbox (CLI was already openshell).
The S3 bucket navigator-pypi-artifacts is flagged with a TODO comment
as it requires external coordination to rename.