New Linux page (#491)

Co-Authored-By: Daniel Gray <dng@disroot.org>

_data/nav/2_software.yml

@@ -5,10 +5,6 @@ items:
     title: Browsers
     icon: fad fa-browser
     file: _evergreen/browsers.md
-  - type: link
-    title: Operating Systems (Legacy)
-    icon: fad fa-compact-disc
-    file: legacy_pages/os.html
   - type: divider
   - type: link
     title: Calendar/Contacts Sync Tools

_data/nav/3_operating_systems.yml

@@ -5,3 +5,15 @@ items:
     title: Android
     icon: fab fa-android
     file: _evergreen/android.md
+  - type: link
+    title: Linux Desktop
+    icon: fab fa-linux
+    file: _evergreen/linux-desktop.md
+  - type: link
+    title: Qubes OS
+    icon: fab fa-linux
+    file: _evergreen/qubes.md
+  - type: link
+    title: Router
+    icon: fa-duotone fa-circle-nodes
+    file: _evergreen/router.md