[RW-1006] Submit question when pressing enter in the question textarea

[orakili]

Refs: RW-1006

Submit the question when pressing enter in the question textarea.

Tests

1. Make sure to have the ocha_ai use this PR's branch (add - "../../ocha_ai:/srv/www/html/modules/contrib/ocha_ai:ro" for example in the local/docker.compose.yml).
2. Clear the cache
3. Open a report on your local RW (do a hard refresh to make sure the ocha_form.js is the newest version)
4. Open the chat popup, type a question
5. Still in the textare, press shift + enter to confirm, you can add a new line
6. Press enter and confirm that is submits the question

[github-actions]

Monitor coverage for Drupal 10.3.x - PHP 8.2

Totals
Statements:	87.88% ( 116 / 132 )
Methods:	25% ( 2 / 8 )
Lines:	91.94% ( 114 / 124 )

[github-actions]

Monitor coverage for Drupal 10.2.x - PHP 8.2

Totals
Statements:	87.88% ( 116 / 132 )
Methods:	25% ( 2 / 8 )
Lines:	91.94% ( 114 / 124 )

[github-actions]

Monitor coverage for Drupal 10.3.x - PHP 8.3

Totals
Statements:	87.88% ( 116 / 132 )
Methods:	25% ( 2 / 8 )
Lines:	91.94% ( 114 / 124 )

[github-actions]

Monitor coverage for Drupal 10.2.x - PHP 8.3

Totals
Statements:	87.88% ( 116 / 132 )
Methods:	25% ( 2 / 8 )
Lines:	91.94% ( 114 / 124 )

[lazysoundsystem]

Works as described.

Note that the separate paragraph in the text area isn't reflected in the quoted question - but I don't think that matters.