reuse: add page (#16443)

pages/common/reuse.md

@@ -0,0 +1,20 @@
+# reuse
+
+> Tool for compliance with the REUSE recommendations.
+> More information: <https://reuse.readthedocs.io/en/stable/man/index.html>.
+
+- Lint for REUSE compliance for the current project (version control aware):
+
+`reuse lint`
+
+- Lint for REUSE compliance from the specified directory:
+
+`reuse --root {{path/to/directory}} lint`
+
+- Download a license by its SPDX identifier and place it in the LICENSES directory:
+
+`reuse download {{spdx-identifier}}`
+
+- Download all missing licenses detected in the project:
+
+`reuse download --all`