Update cheatsheets

dolt-add

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dolt add
+
+> Add the contents of a table to the list of Dolt staged tables.
+> More information: <https://docs.dolthub.com/cli-reference/cli#dolt-add>.
+
+- Add a table to the list of staged tables (stage a table):
+
+`dolt add {{table}}`
+
+- Stage all tables:
+
+`dolt add --all`