fix: declare 'waybar' config and add it to 'niri' desktop

home/modules/waybar/config.jsonc

@@ -0,0 +1,25 @@
+[
+  {
+    "height": 16,
+    "spacing": 4,
+    "modules-left": ["niri/workspaces"],
+    "modules-center": ["sway/window"],
+    "modules-right": ["battery", "clock"],
+    "clock": {
+      "format": "W{:%V %d %b %H:%M}",
+      "tooltip-format": "{calendar}",
+      "format-alt": "{:%Y-%m-%d %H:%M:%S}",
+    },
+    "battery": {
+      "states": {
+        "good": 80,
+        "warning": 20,
+        "critical": 10,
+      },
+      "format": "{capacity}%",
+      "format-charging": "↑{capacity}%",
+      "format-plugged": "{capacity}%",
+      "format-alt": "{time}",
+    },
+  },
+]