feat improve user error information

[TejInaco]

Currently, the error messages are insufficient for users to understand what is happening when editing JSON. Additionally, some critical validation errors are not displayed in the front end, which impacts usability and troubleshooting.

This PR does:

1. Display all validation errors in the UI to ensure users have full visibility.
2. Introduce an “Additional Checks” section to surface errors provided by the validation layer that were previously unused in the front end.
3. Improve the user experience when editing JSON by providing clearer and more actionable feedback.
4. Fix issue JSON Schema Errors are not shown #154 related to incomplete error reporting.
5. [Updated: Depreceated] Comment out the removal of the @type key when converting a TM to TD, as this behavior caused unintended data loss.

[netlify]

✅ Deploy Preview for editdor ready!

Name	Link
🔨 Latest commit	07fbb74
🔍 Latest deploy log	https://app.netlify.com/projects/editdor/deploys/6943e8138795ba0008087116
😎 Deploy Preview	https://deploy-preview-169--editdor.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[TejInaco]

Example of what a user can experience:



Ready to re

[egekorkan]

Also tried the new frontend messages. I have turned an "observable":true into observable:"true" and got JSON Schema validation failed: Unknown schema validation error.

[TejInaco]

Ready to be merged.