refactor(docs): Integrate `Dev Guides` into `Development` section

Improves discoverability.

docs/docs/features/encoders.md

@@ -41,4 +41,4 @@ Here, the left encoder is configured to control volume up and down while the rig
 
 ## Adding Encoder Support
 
-See the [New Keyboard Shield](../development/guide-new-shield#encoders) documentation for how to add or modify additional encoders to your shield.
+See the [New Keyboard Shield](../development/new-shield#encoders) documentation for how to add or modify additional encoders to your shield.

docs/docs/hardware.md

@@ -47,4 +47,4 @@ Until detailed documentation is available, feel free to ask questions about how
 
 ## Contributing
 
-If you'd like to add support for a new keyboard shield, head over to the [New Keyboard Shield](development/guide-new-shield) documentation.
+If you'd like to add support for a new keyboard shield, head over to the [New Keyboard Shield](development/new-shield) documentation.

docs/docs/user-setup.md

@@ -105,7 +105,7 @@ Pick an MCU board:
 :::note
 If you are building firmware for a new keyboard shield that is not included in the built-in
 list of shields, you can choose any shield from the list that is similar to yours to generate the repository,
-and edit / add necessary files according to the [guide for adding new keyboard shield](./development/guide-new-shield).
+and edit / add necessary files according to the [guide for adding new keyboard shield](./development/new-shield).
 :::
 
 When prompted, enter the number for the corresponding keyboard shield you would like to target:

docs/sidebars.js

@@ -44,7 +44,12 @@ module.exports = {
       "development/posix-board",
       "development/tests",
       "development/usb-logging",
+      {
+        type: "category",
+        label: "Guides",
+        collapsed: false,
+        items: ["development/new-shield"],
+      },
     ],
-    "Dev Guides": ["development/guide-new-shield"],
   },
 };