Add an option to disable JavaScript

[Igetin]

Describe the enhancement

There should be a configuration option to disable JavaScript altogether. When the value of this setting is true, no <script> tags or <link> tags pointing to JS resources should be included on any page. This should also imply disabling any of the theme features that depend on JavaScript (like the light/dark toggle button).

Currently one needs to override the baseof.html template in order to remove coder.js from the pages.