feat: Alt-Enter inserts newline without continuing comment

[nik-rev]

The comment functionality is really useful, but often times I just want to make a newline without continuing the current comment. And without needing to disable the feature entirely, just for 1 newline

This PR:

• Renames insert_newline to insert_newline_continue_comment
• Adds insert_newline, which does not continue the comment
• Binds Alt-Enter to insert_newline and Enter to insert_newline_continue_comment

Also added these, but feel free to reject them:

• Renames open_below and open_above to open_below_continue_comment and open_above_continue_comment
• Adds open_below and open_above which add a newline below and above, but do not continue the comment
• Binds go to open_below and o to open_below_continue_comment
• Binds gO to open_above and O to open_above_continue_comment

Related to #12423

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Note: Chose A-ret instead of S-ret because the latter seems to not be supported by Helix. I tested with Kitty and Wezterm

[TornaxO7]

Hm... I see what you mean, but isn't fine for removing the comment token?

[nik-rev]

Hm... I see what you mean, but isn't fine for removing the comment token?

could you clarify what you mean by this?

[pascalkuthe]

Not really a fan of the proliferation of commands and keybindings here.

I think <ret><c-w> is not much worse than <alt-ret> and has the same effect. This is also the solution used in vim (continue comments is even the default there)

[TornaxO7]

Hm... I see what you mean, but isn't fine for removing the comment token?

could you clarify what you mean by this?

Oh lol, somehow a word despawned or I didn't write it out. I meant <C-w> while in insert mode. In general you can use it in your terminal to remove a whole word.

[nik-rev]

Ok, that sounds reasonable. I am happy with these keybindings:

[keys.insert]
A-ret = ["insert_newline", "delete_word_backward"]

[keys.normal.g]
O = ["open_above", "delete_word_backward"]
o = ["open_below", "delete_word_backward"]

Which do mostly the same as what we have in the PR. (exception is that if you use them on a line that is not a comment, it will delete the leading tabs that get auto-inserted with tree sitter, but i dont think its a big deal since you would only use these keybindings on lines with comments)