Add Image validator helper func

[sudhanshutech]

Notes for Reviewers

This PR fixes #

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[MUzairS15]

A basic URL verification will be helpful, to validate if the url provided is acutally a uri and not a random text/executable script code.
It will also help to skip the effort of trying to load the url if it's invalid.

[leecalcote]

A basic URL verification will be helpful, to validate if the url provided is acutally a uri and not a random text/executable script code. It will also help to skip the effort of trying to load the url if it's invalid.

Great comment!

[leecalcote]

merge conflict...

[leecalcote]

I'll offer the suggestion that we close this PR. What do you think, @sudhanshutech?