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

tldr/git-fork

@@ -0,0 +1,18 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git fork
+
+> Fork a GitHub repo. Like `git clone` but forks first.
+> Part of `git-extras`.
+> More information: <https://github.com/tj/git-extras/blob/master/Commands.md#git-fork>.
+
+- Fork and clone a GitHub repository by its URL:
+
+`git fork {{https://github.com/tldr-pages/tldr}}`
+
+- Fork and clone a GitHub repository by its slug:
+
+`git fork {{tldr-pages/tldr}}`