feat(cli): add administrator account controls

[Ghost-Frame]

Summary

• Add typed client operations for administrator role grants, role revocations, and account status transitions.
• Add frameshift account grant-role, revoke-role, and set-status with closed role and status values.
• Document administrator account controls and last-administrator protection.

Verification

• cargo fmt --all -- --check
• git diff --check
• cargo test -p frameshift-client -p frameshift-cli --no-default-features
• cargo clippy --locked --workspace --all-targets -- -D warnings