Nix-native packaging for DeepSeek Harness (dsh)

Key features

• The Home Manager module's default package builds pkgs/dsh.nix against your nixpkgs, which must provide fetchPnpmDeps and pnpmConfigHook.
• Spec-string plugins change their resolved content only when their specsHash is updated — deliberate lockfile-style ceremony.
• Upstream dsh ships no TUI surface (only web and headless profiles)
• a third-party TUI bundle would slot in as one plugin entry.