lb: add page (#6354)

pages/common/lb.md

@@ -0,0 +1,29 @@
+# lb
+
+> A tool for managing a blog contained in the current directory.
+> Drafts and posts to operate on are selected interactively when running the commands.
+> More information: <https://github.com/LukeSmithxyz/lb>.
+
+- Make a new draft:
+
+`lb new`
+
+- Edit a draft:
+
+`lb edit`
+
+- Delete a draft:
+
+`lb trash`
+
+- Publish a draft:
+
+`lb publish`
+
+- Delete a published post:
+
+`lb delete`
+
+- Unpublish a published post to edit it as a draft again:
+
+`lb revise`