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

tldr/pyats-version

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pyats version
+
+> View and upgrade the pyATS installation.
+> More information: <https://developer.cisco.com/pyats/>.
+
+- Display version of all packages:
+
+`pyats version check`
+
+- Display outdated packages:
+
+`pyats version check --outdated`
+
+- Update packages to the most recent version:
+
+`pyats version update`
+
+- Update or downgrade packages to a specific version:
+
+`pyats version update {{version}}`