fix: show validation errors on submit

[girishpanchal30]

Closes #2735

Summary

Validate the form input fields to show the validation.

Checklist before the final review

• Included E2E or unit tests for the changes in this PR.
• Visual elements are not affected by independent changes.
• It is at least compatible with the minimum WordPress version.
• It loads additional scripts in the frontend only if they are required.
• Does not impact the Core Web Vitals.
• In case of deprecation, old blocks are safely migrated.
• It is usable in Widgets and FSE.
• Copy/Paste is working if the attributes are modified.
• PR is following the best practices

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Bundle Size Diff

Package	Old Size	New Size	Diff
Animations	271.38 KB	271.38 KB	0 B (0.00%)
Blocks	1.54 MB	1.54 MB	-4 B (-0.00%)
CSS	100.76 KB	100.76 KB	0 B (0.00%)
Dashboard	198.36 KB	198.36 KB	0 B (0.00%)
Onboarding	160.8 KB	160.8 KB	0 B (0.00%)
Export Import	97.73 KB	97.73 KB	0 B (0.00%)
Pro	407.08 KB	407.08 KB	0 B (0.00%)

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