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

tldr/grip

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# grip
+
+> Preview GitHub-flavoured Markdown files locally.
+> More information: <https://github.com/joeyespo/grip>.
+
+- Start the server and serve the rendered `README` file of a current directory:
+
+`grip`
+
+- Start the server and serve a specific Markdown file:
+
+`grip {{path/to/file.md}}`
+
+- Start the server and open the `README` file of the current directory in the browser:
+
+`grip --browser`
+
+- Start the server in the specified port and serve the rendered `README` file of the current directory:
+
+`grip {{port}}`