Added advanced guides page

docs/docs/advanced-guides/index.md

@@ -0,0 +1,12 @@
+---
+title: Advanced Guides
+sidebar_label: Advanced Guides
+---
+
+import DocCardList from "@theme/DocCardList";
+
+ZMK, being built on [Zephyr™](https://zephyrproject.org/), is very modular and flexible. This allows users to combine features, flags, and properties to "construct" features in ZMK, without the need to modify the underlying source code.
+
+These pages are a collection of guides for users who want a _bit_ more out of their ZMK devices, without the need to delve into the [Zephyr™](https://zephyrproject.org/) documentation. Guides aimed at keyboard designers are also found under this section.
+
+<DocCardList />

docs/sidebars.js

@@ -114,6 +114,16 @@ module.exports = {
         "config/system",
       ],
     },
+    {
+      type: "category",
+      label: "Advanced Guides",
+      link: {
+        type: "doc",
+        id: "advanced-guides/index",
+      },
+      collapsed: true,
+      items: [],
+    },
     {
       Development: [
         "development/clean-room",