internal: Annotate all components with groups

This commit ensures that the compiler has to check every component
against the groups they implement by explicitly annotating the
appropriate interfaces.

internal/dis/component/control/control.go

@@ -16,6 +16,10 @@ type Control struct {
 	Servables []component.Servable
 }
 
+var (
+	_ component.Installable = (*Control)(nil)
+)
+
 func (control Control) Path() string {
 	return filepath.Join(control.Still.Config.DeployRoot, "core", "dis")
 }

internal/dis/component/control/home/home.go

@@ -24,6 +24,10 @@ type Home struct {
 	homeBytes     lazy.Lazy[[]byte]
 }
 
+var (
+	_ component.Servable = (*Home)(nil)
+)
+
 func (*Home) Routes() []string { return []string{"/"} }
 
 func (home *Home) Handler(ctx context.Context, route string, io stream.IOStream) (http.Handler, error) {

internal/dis/component/control/info/info.go

@@ -26,6 +26,11 @@ type Info struct {
 	SnapshotsLog *logger.Logger
 }
 
+var (
+	_ component.DistilleryFetcher = (*Info)(nil)
+	_ component.Servable          = (*Info)(nil)
+)
+
 func (*Info) Routes() []string { return []string{"/dis/"} }
 
 func (info *Info) Handler(ctx context.Context, route string, io stream.IOStream) (handler http.Handler, err error) {

internal/dis/component/control/static/static.go

@@ -15,6 +15,10 @@ type Static struct {
 	component.Base
 }
 
+var (
+	_ component.Servable = (*Static)(nil)
+)
+
 func (*Static) Routes() []string { return []string{"/static/"} }
 
 //go:embed dist