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>

README.md

@@ -183,7 +183,13 @@ replace this by your own, custom theme in multiple ways:
    Note that you can name your theme as you wish but avoid theme names
    starting with `__` or `$` as this namespace is reserved.
 
-   This is the preferred way to specify a custom theme.
+   This is the preferred way to specify a custom theme. See [examples/strict.json][]
+   for a minimal example that you can copy to `~/.config/feedbackd/themes/`
+   and enable via
+
+   ```sh
+   gsettings set org.sigxcpu.feedbackd theme strict
+   ```
 
 For available feedback types see the [feedback-themes][](5) manpage.
 
@@ -370,3 +376,4 @@ on IRC and bug tracker.
 [event-spec]: ./doc/Event-naming-spec-0.0.0.md
 [theme-spec]: ./doc/Feedback-theme-spec-0.0.0.md
 [libfeedback-api]: https://feedbackd-b29738.pages.freedesktop.org/
+[examples/strict.json]: ./examples/strict.json

examples/strict.json

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