Add vintage lamp and improve backend

src/main/resources/assets/new_soviet/blockstates/vintage_lamp.json

@@ -0,0 +1,10 @@
+{
+  "variants": {
+    "inverted=true": {
+      "model": "new_soviet:block/vintage_lamp"
+    },
+    "inverted=false": {
+      "model": "new_soviet:block/vintage_lamp"
+    }
+  }
+}