Add XDG JSON theme, font and button configuration with installer repair

assets/config.example.json

@@ -0,0 +1,21 @@
+{
+  "font": "",
+  "theme": {
+    "background": "#0c101b",
+    "card": "#141c2b",
+    "ink": "#e6f0f9",
+    "muted": "#97adc1",
+    "accent": "#1ff0a4",
+    "warning": "#ff6e87",
+    "frame_start": "#1fff91",
+    "frame_end": "#1f70ff"
+  },
+  "buttons": {
+    "left_grip": "/user/hand/left/input/grip",
+    "right_grip": "/user/hand/right/input/grip",
+    "ptt": "/user/hand/right/input/x",
+    "cancel": "",
+    "insert": "",
+    "enter": ""
+  }
+}