virt-what: add page (#16980)

Co-authored-by: Dylan <145150333+dmmqz@users.noreply.github.com>

pages/linux/virt-what.md

@@ -0,0 +1,17 @@
+# virt-what
+
+> Shell script that detects if you are running in a virtual machine.
+> Outputs a specific code for a virtual machine if detected.
+> More information: <https://manned.org/virt-what>.
+
+- Detect if you are running in a virtual machine:
+
+`virt-what`
+
+- Log output of `virt-what` into a file:
+
+`virt-what > {{path/to/file}}`
+
+- Display version:
+
+`virt-what --version`