coffee: add page (#2227)

pages/common/coffee.md

@@ -0,0 +1,23 @@
+# coffee
+
+> Executes CoffeeScript scripts or compiles them into JavaScript.
+
+- Run a script:
+
+`coffee {{path/to/file.coffee}}`
+
+- Compile to JavaScript and save to a file with the same name:
+
+`coffee --compile {{path/to/file.coffee}}`
+
+- Compile to JavaScript and save to a given output file:
+
+`coffee --compile {{path/to/file.coffee}} --output {{path/to/file.js}}`
+
+- Run interactive REPL:
+
+`coffee --interactive`
+
+- Watch script for changes and re-run script:
+
+`coffee --watch {{path/to/file.coffee}}`