Validate URL on Redirection to avoid breaking app

[ShubhamPalriwala]

What does this PR do?

When you set an invalid URL in the "Forward after survey completion" input field, the app breaks, this PR fixes it by putting a check and sending a toast when the URL is not a valid one!

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• Added a screen recording or screenshots to this PR
• Filled out the "How to test" section in this PR
• Read the contributing guide
• Self-reviewed my own code
• Commented on my code in hard-to-understand bits
• Ran pnpm build
• Checked for warnings, there are none
• Removed all console.logs
• Merged the latest changes from main onto my branch with git pull origin main
• My changes don't cause any responsiveness issues
• Updated the Formbricks Docs if changes were necessary

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Name	Status	Preview	Comments	Updated (UTC)
formbricks-cloud	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 30, 2023 0:54am

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formbricks-com	⬜️ Ignored (Inspect)	Visit Preview		Aug 30, 2023 0:54am