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

tldr/linux/edit

@@ -0,0 +1,18 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# edit
+
+> An alias to a `run-mailcap`'s action edit.
+> Originally `run-mailcap` is used to process/edit mime-type/file.
+> More information: <https://www.computerhope.com/unix/uedit.htm>.
+
+- Edit action can be used to view any file on default mailcap explorer:
+
+`edit {{filename}}`
+
+- With `run-mailcap`:
+
+`run-mailcap --action=edit {{filename}}`