svgcleaner: add page

See #2182

pages/common/svgcleaner.md

@@ -0,0 +1,11 @@
+# svgcleaner
+
+> SVG image optimizing utility.
+
+- Optimize an SVG image:
+
+`svgcleaner {{input.svg}} {{output.svg}}`
+
+- Optimize an SVG image multiple times:
+
+`svgcleaner --multipass {{input.svg}} {{output.svg}}`