Add auto-closing pairs and list continuation to textStokes (Markdown-Editor-like behavior)

[demhauke]

This PR introduces two main improvements to text editing behavior:

• Auto-closing pairs
  When the user types an opening character such as (, [, {, ", or ', the corresponding closing character is automatically inserted.

• Automatic list continuation (Bullet points(Lists) #1315)
  When the user presses Enter after a line starting with a bullet or indentation (e.g., -, *, or similar), the next line will automatically include the same prefix.

• before

before.mp4

• after

after.mp4

[Doublonmousse]

I'm not fully convinced of the current implementation. There are cases where this can be annoying instead of helping

• if I type semi-open intervals like [a,b) it'll get in the way. Typing times like 60"30' will get harder too. It also won't activate for the first character inserted (although fixing that would need some care as to not impact negatively pasted text)
• for the automatic list continuation, the take_while may be too much and the possible characters too wide. It I for some reason use - and * to write morse code on the first line, getting it repeated in full on the next line is not expected. Maybe that's not a great example though. If I type .Net on a line beginning, getting the dot repeated on the next line is again a little bit unexpected. Maybe restricting it to - with the extra space included would be better.

I don't know how much we can fix without actually adding somehow a concept of bullet points to the text field (and associated settings) in a word/office-like manner.

[Nugfle]

it would be nice to have a markdown-like list, but maybe put the functionality behind a button so it doesn't get in the way when using the text field for the purposes listed above.

[Keschler]

Maybe make this feature optional. So if the user wants it, he can activate it in the settings.