rename and reorganize guide pages

src/guide/index.mdx

@@ -1,17 +1,6 @@
 ---
-title: "Configuration"
+title: "Usage Guide"
 description: "Configuring the shell"
+index: -1
 ---
 # {frontmatter.title}
-
-See [Getting Started](/docs/configuration/getting-started) for installation and editor configuration instructions.
-
-You should start with the [Introduction](/docs/configuration/intro) which will guide you
-through the basics of QML by creating a simple topbar with a clock.
-
-From there you can read the [QML Overview](/docs/configuration/qml-overview) to get an overview of
-the QML language, or jump right into the [Type Reference](/docs/types) to find
-types you can use in your shell.
-
-The [quickshell-examples](https://git.outfoxxed.me/quickshell/quickshell-examples) repo contains
-fully working example configurations you can read and modify.

src/guide/install-setup.mdx

@@ -1,5 +1,6 @@
 ---
-title: "Getting Started"
+title: "Installation & Setup"
+index: 0
 ---
 # {frontmatter.title}
 > [!NOTE]

src/guide/introduction.mdx

@@ -1,5 +1,6 @@
 ---
 title: "Introduction"
+index: 2
 ---
 
 import Collapsible from "@components/Collapsible.astro";

src/guide/positioning.mdx

@@ -1,5 +1,6 @@
 ---
 title: "Positioning"
+index: 2
 ---
 import MD_Title from "@components/MD_Title.tsx"
 

src/guide/qml-language.mdx

@@ -1,5 +1,6 @@
 ---
-title: "QML Overview"
+title: "QML Language"
+index: 10
 ---
 import MD_Title from "@components/MD_Title.tsx"
 import Collapsible from "@components/Collapsible.astro";