examples: Add a less blinky example

Uncategorized notifications can be distracting. Add an example that
disable the notification LED for these. Copy to

~/.config/feedbackd/themes/

and enable via

gsettings set org.sigxcpu.feedbackd theme strict

Signed-off-by: Guido Günther <agx@sigxcpu.org>

examples/strict.json

@@ -0,0 +1,15 @@
+{
+  "name": "strict",
+  "parent-name": "$device",
+  "profiles" : [
+    {
+      "name" : "silent",
+      "feedbacks" : [
+	{
+	  "event-name" : "notification-missed-generic",
+	  "type"       : "dummy"
+	}
+      ]
+    }
+  ]
+}