dolt-checkout: add page (#5480)

pages/common/dolt-checkout.md

@@ -0,0 +1,20 @@
+# dolt checkout
+
+> Checkout the work tree or tables to a specific branch or commit.
+> More information: <https://github.com/dolthub/dolt>.
+
+- Switch to a branch:
+
+`dolt checkout {{branch_name}}`
+
+- Revert unstaged changes to a table:
+
+`dolt checkout {{table}}`
+
+- Create new branch and switch to it:
+
+`dolt checkout -b {{branch_name}}`
+
+- Create new branch based on a specified commit and switch to it:
+
+`dolt checkout -b {{branch_name}} {{commit}}`