feat(niri): add blur config

niri/rules.kdl

@@ -1,6 +1,9 @@
 window-rule {
     match is-active=false
     opacity 0.9
+    background-effect {
+        blur true
+    }
 }
 
 window-rule {
@@ -51,6 +54,11 @@ window-rule {
     default-column-width { fixed 1280; }
     default-window-height { proportion 0.66; }
     open-floating true
+    opacity 0.9
+    background-effect {
+        blur true
+        xray false
+    }
 }
 
 window-rule {
@@ -132,3 +140,12 @@ window-rule {
     open-fullscreen true
     geometry-corner-radius 0
 }
+
+layer-rule {
+    match layer="top"
+    match layer="overlay"
+
+    background-effect {
+        xray false
+    }
+}