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

tldr/pyats-shell

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pyats shell
+
+> Start a pre-loaded pyATS interactive Python Shell to save time in prototyping.
+> More information: <https://pubhub.devnetcloud.com/media/genie-docs/docs/cli/genie_shell.html>.
+
+- Open pyATS shell with a defined Testbed file:
+
+`pyats shell --testbed-file {{path/to/testbed.yaml}}`
+
+- Open pyATS shell with a defined Pickle file:
+
+`pyats shell --pickle-file {{path/to/pickle.file}}`
+
+- Open pyATS with IPython disabled:
+
+`pyats shell --no-ipython`