refactor: Improve code highlight

[lucas-goldner]

Description

Having worked on two presentations with flutter_deck, I am enjoying it, but one thing I think could be improved: Showing code.

Design:

Here are two screenshots comparing how it looks on flutter_deck and how I implemented it in fluttershow:

flutter_deck

fluttershow

You can check the implementation here:
https://github.com/lucas-goldner/fluttershow_base/blob/main/lib/components/widgets/wrapper/code_display.dart

I also have like a billion themes hard coded:
https://github.com/lucas-goldner/fluttershow_base/blob/main/lib/components/model/enum/code_display_themes.dart

Maybe we could merge them somehow for a more appealing view

Auto format:

This would only work for Dart, but manually formatting can be annoying.
I used this library here:
https://github.com/lucas-goldner/fluttershow_base/blob/main/lib/components/helper/format_code.dart
Of course, it should be toggleable

Requirements

If you agree with any of those points, we can define requirements

[mkobuolys]

Hey! I think this issue can be closed and the discussion moved to #94. Using the same code styling as used in the slick_slides package should also solve this.

[lucas-goldner]

Ah didn't see that one, yeah then let's use the slick one 😆