Update cheatsheets

dvc-add

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dvc add
+
+> Add changed files to the index.
+> More information: <https://dvc.org/doc/command-reference/add>.
+
+- Add a single target file to the index:
+
+`dvc add {{path/to/file}}`
+
+- Add a target directory to the index:
+
+`dvc add {{path/to/directory}}`
+
+- Recursively add all the files in a given target directory:
+
+`dvc add --recursive {{path/to/directory}}`
+
+- Add a target file with a custom `.dvc` filename:
+
+`dvc add --file {{custom_name.dvc}} {{path/to/file}}`