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

tldr/link

@@ -0,0 +1,14 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# link
+
+> Create a hard link to an existing file.
+> For more options, see the `ln` command.
+> More information: <https://www.gnu.org/software/coreutils/link>.
+
+- Create a hard link from a new file to an existing file:
+
+`link {{path/to/existing_file}} {{path/to/new_file}}`