Filesystem preliminary support

Default IndexFS filesystem which provides access to minimal index.html, favicon.ico and WebFront.js file (embedded in executable)

addScript

What's Changed

• HTTPServer by @ambroise-leclerc in #11
• Websocket by @ambroise-leclerc in #10
• UI::addScript by @ambroise-leclerc in #30

Full Changelog: https://github.com/ambroise-leclerc/WebFront/commits/v0.0.1