git-sparse-checkout: add page (#18526)

Author: msaf9

pages/common/git-sparse-checkout.md

@@ -0,0 +1,20 @@
+# git sparse-checkout
+
+> Check out only part of a repository’s files instead of cloning or checking out everything.
+> More information: <https://manned.org/git-sparse-checkout>.
+
+- Enable sparse checkout:
+
+`git sparse-checkout init`
+
+- Disable sparse-checkout and restore full repository:
+
+`git sparse-checkout disable`
+
+- Specify which directories (or files) to include:
+
+`git sparse-checkout set {{path/to/directory}}`
+
+- Add more paths later:
+
+`git sparse-checkout add {{path/to/directory}}`