Add label priority configuration for GitHub

.github/label-priority.json

@@ -0,0 +1,38 @@
+{
+  "priorities": {
+    "refactor": 3,
+    "feature": 2,
+    "bugfix": 1,
+    "new script": 3,
+    "update script": 2,
+    "delete script": 2,
+    "json": 3,
+    "website": 2,
+    "maintenance": 1,
+    "documentation": 1,
+    "core": 2,
+    "api": 2,
+    "addon": 2,
+    "pve-tool": 2,
+    "vm": 2,
+    "github": 1
+  },
+  "conflicts": {
+    "bugfix": ["refactor"],
+    "website": ["json"],
+    "update script": ["new script", "delete script"],
+    "new script": ["update script", "delete script"],
+    "delete script": ["new script", "update script"]
+  },
+  "rules": {
+    "always_combine": [
+      "maintenance",
+      "core",
+      "api",
+      "addon",
+      "pve-tool",
+      "vm",
+      "github"
+    ]
+  }
+}