pulumi-version: add page (#14770)

Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>
Co-authored-by: Juri Dispan <juri.dispan@posteo.net>

pages/common/pulumi-version.md

@@ -0,0 +1,12 @@
+# pulumi version
+
+> Display Pulumi's version number.
+> More information: <https://www.pulumi.com/docs/iac/cli/commands/pulumi_version/>.
+
+- Display version:
+
+`pulumi version`
+
+- Display help:
+
+`pulumi version {{-h|--help}}`