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

tldr/git-add

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git add
+
+> Adds changed files to the index.
+> More information: <https://git-scm.com/docs/git-add>.
+
+- Add a file to the index:
+
+`git add {{path/to/file}}`
+
+- Add all files (tracked and untracked):
+
+`git add -A`
+
+- Only add already tracked files:
+
+`git add -u`
+
+- Also add ignored files:
+
+`git add -f`
+
+- Interactively stage parts of files:
+
+`git add -p`
+
+- Interactively stage parts of a given file:
+
+`git add -p {{path/to/file}}`
+
+- Interactively stage a file:
+
+`git add -i`