aur: add page (#12333)

* aur: add page

---------

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

pages/linux/aur.md

@@ -0,0 +1,21 @@
+# aur
+
+> Build packages from the AUR and manage local repositories.
+> Note: A local repository needs to be set in `/etc/pacman.conf` and `vifm` needs to be installed for this to fully function.
+> More information: <https://github.com/aurutils/aurutils>.
+
+- Search the AUR database for a package:
+
+`aur search {{keyword}}`
+
+- Download a package and its dependencies from AUR, build them and add them to a local repository:
+
+`aur sync {{package}}`
+
+- [l]ist packages available in your local repository:
+
+`aur repo --list`
+
+- [u]pgrade local repository packages:
+
+`aur sync --upgrades`