Move pages under tldr, lint run.sh, update docs

tldr/glab-auth

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# glab auth
+
+> Authenticate with a GitLab host.
+> More information: <https://glab.readthedocs.io/en/latest/auth>.
+
+- Log in with interactive prompt:
+
+`glab auth login`
+
+- Log in with a token:
+
+`glab auth login --token {{token}}`
+
+- Check authentication status:
+
+`glab auth status`
+
+- Log in to a specific GitLab instance:
+
+`glab auth login --hostname {{gitlab.example.com}}`