basename: add page

pages/common/basename.md

@@ -0,0 +1,11 @@
+# basename
+
+> Returns non-directory portion of a pathname.
+
+- Show only the file name from a path:
+
+`basename {{path/to/file}}`
+
+- Show only the file name from a path, with a suffix removed:
+
+`basename {{path/to/file}} {{suffix}}