IBX-8651: Added file type validation for image fields

[albozek]

🎫 Issue	IBX-8651

Description:

For QA:

Fix is in shared components — affects not only Tags form:

• ezimage fields (tags, content items, any type with an image field):
  • field without configured image formats — file dialog now filters to images,
    dropping a non-image shows the "invalid file type" error instead of accepting the file,
  • field with configured formats — behaviour unchanged on selection, but a rejected
    drop now shows the error instead of doing nothing.
• Other file fields using the same drop handler (ezbinaryfile, ezmedia, ezimageasset —
  e.g. product images): a drop rejected by their allowed types now shows the error
  instead of silently doing nothing.

Documentation:

[sonarqubecloud]

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 SonarQube Cloud