A method where argument is plain_text url, if already exists, return the shorten one or create new one instead of throwing exceptions

[aleedksa]

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[yordadev]

Hey @aleedksa thanks for submitting this issue.

I'm actively working on version 3 of this package. This update specifically addresses the issue of duplicate URLs, allowing them if the configuration is set accordingly. The package appends ?x_dup_link_id={uuid} to the URL before hashing it for the signature. An accessor on the ShortUrl model removes the x_dup_link_id={uuid} when using plain_text.

I'm aiming to submit a pull request next week for feedback before releasing version 3. It's a rather significant update.

I will leave this open until the release.