xbps-{install,remove,query}: add page; xbps: update page (#10354)

* xbps-query: add page

* xbps: remove examples and add redirections to subpages

* xbps-install: add page

* xbps-remove: add page

* xbps*: `package_name` => `package`

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/linux/xbps-install.md

@@ -0,0 +1,13 @@
+# xbps-install
+
+> XBPS utility to (re)install and update packages.
+> See also: `xbps`.
+> More information: <https://man.voidlinux.org/xbps-install.1>.
+
+- Install a new package:
+
+`xbps-install {{package}}`
+
+- Synchronize and update all packages:
+
+`xbps-install --sync --update`