feat: url based multi-format loaders/decoders

internal/data/scheme/stdin/loader_handler.go

@@ -0,0 +1,23 @@
+package stdin
+
+import (
+	"io"
+	"net/url"
+	"os"
+)
+
+const SchemeStdin = "stdin"
+
+type LoaderHandler struct{}
+
+func (h *LoaderHandler) Match(url *url.URL) bool {
+	return url.Scheme == SchemeStdin
+}
+
+func (h *LoaderHandler) Open(url *url.URL) (io.ReadCloser, error) {
+	return os.Stdin, nil
+}
+
+func NewLoaderHandler() *LoaderHandler {
+	return &LoaderHandler{}
+}