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-query.md

@@ -0,0 +1,25 @@
+# xbps-query
+
+> XBPS utility to query for package and repository information.
+> See also: `xbps`.
+> More information: <https://man.voidlinux.org/xbps-query.1>.
+
+- Search for a package in remote repositories using a regular expression or a keyword (if `--regex` is omitted):
+
+`xbps-query --search {{regular_expression|keyword}} --repository --regex`
+
+- Show information about an installed package:
+
+`xbps-query --show {{package}}`
+
+- Show information about a package in remote repositories:
+
+`xbps-query --show {{package}} --repository`
+
+- List packages registered in the package database:
+
+`xbps-query --list-pkgs`
+
+- List explicitly installed packages (i.e. not automatically installed as dependencies):
+
+`xbps-query --list-manual-pkgs`