Replace Bash qvm scripts with Go CLI implementation

internal/virtiofsd/mount.go

@@ -0,0 +1,51 @@
+package virtiofsd
+
+import (
+	"path/filepath"
+	"qvm/internal/config"
+)
+
+// Mount represents a single virtiofsd mount configuration
+type Mount struct {
+	Tag        string // Mount tag (e.g., "cargo_home", "ws_abc12345")
+	HostPath   string // Path on host to share
+	SocketPath string // Path to virtiofsd socket
+}
+
+// DefaultCacheMounts returns the standard cache mounts for cargo, pnpm, and sccache.
+// These are shared across all projects and mounted at VM start.
+func DefaultCacheMounts() []Mount {
+	return []Mount{
+		{
+			Tag:        "cargo_home",
+			HostPath:   config.CargoHome,
+			SocketPath: filepath.Join(config.StateDir, "cargo_home.sock"),
+		},
+		{
+			Tag:        "cargo_target",
+			HostPath:   config.CargoTarget,
+			SocketPath: filepath.Join(config.StateDir, "cargo_target.sock"),
+		},
+		{
+			Tag:        "pnpm_store",
+			HostPath:   config.PnpmStore,
+			SocketPath: filepath.Join(config.StateDir, "pnpm_store.sock"),
+		},
+		{
+			Tag:        "sccache",
+			HostPath:   config.Sccache,
+			SocketPath: filepath.Join(config.StateDir, "sccache.sock"),
+		},
+	}
+}
+
+// WorkspaceMount creates a Mount configuration for a single workspace.
+// mountTag should be the workspace's mount tag (e.g., "ws_abc12345")
+// hostPath is the absolute path on the host to share
+func WorkspaceMount(mountTag, hostPath string) Mount {
+	return Mount{
+		Tag:        mountTag,
+		HostPath:   hostPath,
+		SocketPath: filepath.Join(config.StateDir, mountTag+".sock"),
+	}
+}