IBX-8525: Added language code validation

[tbialcz]

🎫 Issue	IBX-8525

Description:

Added language code validation

Documentation:

Mention language code format

[Steveb-p]

We'll extract PHP 8.3-only errors later to not duplicate them between baselines, as I expect some of them to be shared between 8.0 and 8.3.

[juskora]

Text message should be shortened according to our style guide:
The Language code {{ value }} contains illegal characters. Language code should start with a letter, digit or underscore and only contain letters, digits, underscores, hyphens and colons.
The icon aligned to the top, and the notification in the lower right corner in the red color.

Probably frontend work required.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[juskora]

The notification should look as in the Design System
https://www.figma.com/design/4sbNQyNLhFFwxWDH89Rf9X/%F0%9F%9F%A2-%5BIbexa%5D-Design-System?node-id=1635-71820&t=fJQaf2Z1Co2Lbxk8-4
red color with the exclamation mark icon.

[adamwojs]

The notification should look as in the Design System
https://www.figma.com/design/4sbNQyNLhFFwxWDH89Rf9X/%F0%9F%9F%A2-%5BIbexa%5D-Design-System?node-id=1635-71820&t=fJQaf2Z1Co2Lbxk8-4
red color with the exclamation mark icon.

@juskora This change affects global scope and I would really prefer to proceed it as separate issue. Could you please create JIRA issue with bug report and identify other places where given bug occurs?

[juskora]

@adamwojs Sure, I'll do that, thanks.

[juskora]

QA Approved on Ibexa DXP Commerce 4.6-dev.

[adamwojs]

Thank you @juskora!