Move keycodes to their own section

docs/_summary.md

@@ -42,14 +42,7 @@
   * [Unicode](feature_unicode.md)
   * [Userspace](feature_userspace.md)
 
-* Reference
-  * [Config Options](config_options.md)
-  * [Customizing Functionality](custom_quantum_functions.md)
-  * [Documentation Best Practices](documentation_best_practices.md)
-  * [Documentation Templates](documentation_templates.md)
-  * [Glossary](glossary.md)
-  * [Keymap overview](keymap.md)
-  * [Keycodes](keycodes.md)
+* [Keycodes](keycodes.md)
   * [Backlight](feature_backlight.md#backlight-keycodes)
   * [Basic](keycodes_basic.md)
   * [Bluetooth](feature_bluetooth.md#bluetooth-keycodes)
@@ -64,6 +57,14 @@
   * [Stenography](feature_stenography.md#keycode-reference)
   * [Thermal Printer](feature_thermal_printer.md#thermal-printer-keycodes)
   * [US ANSI Shifted Keys](keycodes_us_ansi_shifted.md)
+
+* Reference
+  * [Config Options](config_options.md)
+  * [Customizing Functionality](custom_quantum_functions.md)
+  * [Documentation Best Practices](documentation_best_practices.md)
+  * [Documentation Templates](documentation_templates.md)
+  * [Glossary](glossary.md)
+  * [Keymap overview](keymap.md)
   * [Unit Testing](unit_testing.md)
 
 * For Makers and Modders