slimrb: add page

pages/common/slimrb.md

@@ -0,0 +1,15 @@
+# slimrb
+
+> Convert Slim files to HTML.
+
+- Convert a Slim file to HTML:
+
+`slimrb {{input.slim}} {{output.html}}`
+
+- Convert a Slim file and output to prettified HTML:
+
+`slimrb --pretty {{input.slim}} {{output.html}}`
+
+- Convert a Slim file to ERB:
+
+`slimrb --erb {{input.slim}} {{output.erb}}`