Add Switch Attribute Explainer

site/src/pages/components/switch.explainer.mdx

@@ -1,6 +1,6 @@
 ---
-menu: Active Proposals
-name: Switch (Explainer)
+menu: Non-active Proposals
+name: Switch Element (Explainer)
 path: /components/switch.explainer
 pathToResearch: /components/switch
 layout: ../../layouts/ComponentLayout.astro
@@ -9,6 +9,8 @@ authors:
     url: https://github.com/gfellerph
 ---
 
+> **Note:** This explainer describes the `<switch>` element proposal, which is not currently being actively pursued. The current active proposal is the [Switch Attribute Explainer](/components/switch.attribute.explainer), which adds a `switch` attribute to `<input type="checkbox">`.
+
 ## Overview
 
 A switch toggles a binary state on or off. Other names include "toggle", "lightswitch", "toggle switch" or "toggle button". [^1]