Rework of omegaup's Karel.js.

It's main reason is so it works in mobile, currently it doesn't because

• CodeMirror 5 isn't mobile compatible
• WorldRenderer scroll doesn't work on all devices
• It is not responsive, toolbar is gone in mobile

This new version includes:

• Now with bootstrap 5
• Now with CodeMirror 6

Features from Karel.js

Migrations

• Migrated to Bootstrap 5.3.0
• Migrated to JQuery 3.6.1
• Migrated to CodeMirror 6
• Migrated Split.js

Deprecated

• Removed Karel Ruby as it didn't worked and it seemed to be in route of deprecation.

Mobile

• Supports touch control on both views.
• UI changes to one better suited for small screens, similar to "Karel blue", aka Karel.exe
• CodeEditor maybe edited without writing.

Quality of live

• Settings that allow to set:
  • Prefered programming language (default is auto as Karel.js)
    • If set, syntax higlighting and compile will always try that language.
  • The view (force one view independent of screen size)
  • Code Font size
• Hotkeys
  • Ctrl+K Decreases editor's font.
  • Ctrl+L Increases editor's font.
• Added the ability to zoom in and out of the world.
• Native scrolling with scrollbars for the world renderer.
  • The previous scroll was hard to use imo.
• Added the ability to specify the name of the file to be downloaded, either code or world
• Added clean button to remove old messages from console.
• "Are you sure?" before reseting code
• "Are you sure?" before reseting world
• Added icons to Karel position.
• If the execution ends in RTE, it is made more noticable by changing the world background color.
• You can change Karel Codes
• Dark and Light mode

World Editor

[x] Reworked world editor.

Now, it works similar to a spreadsheet software.

• World edition is based on cell selection and a toolbar.

You can select a rectangular selection of cells and:

• Place walls on the selection border (You may use the toolbar or WASD hot-keys)
• Add, remove, clear, set the ammount of beepers in the selection (Use 1 ... 9 or Q E R C hot-keys)
• Move/Rotate Karel (Use G or P hot-keys)
• [ ]

Execution

• You can step into a function, out of a function or skip a function, similar to other debuggers
• The stack now also reports what number it is in the stack for readability