glab-alias: add page (#7641)

pages/common/glab-alias.md

@@ -0,0 +1,24 @@
+# glab alias
+
+> Manage GitLab CLI command aliases from the command-line.
+> More information: <https://glab.readthedocs.io/en/latest/alias>.
+
+- Display the subcommand help:
+
+`glab alias`
+
+- List all the aliases `glab` is configured to use:
+
+`glab alias list`
+
+- Create a `glab` subcommand alias:
+
+`glab alias set {{pv}} '{{pr view}}'`
+
+- Set a shell command as a `glab` subcommand:
+
+`glab alias set --shell {{alias_name}} {{command}}`
+
+- Delete a command shortcut:
+
+`glab alias delete {{alias_name}}`