feat: add issue_templates for creation of icons (#935)

Co-authored-by: Dashboard Icons Bot <homarr-labs@proton.me>

scripts/metadata.py

@@ -0,0 +1,9 @@
+import json
+
+
+def load_metadata(icon_name: str) -> dict:
+    try:
+        with open(f"meta/{icon_name}.json", "r") as f:
+            return json.load(f)
+    except FileNotFoundError:
+            raise ValueError(f"Icon '{icon_name}' does not exist")