useScrollLock: Compensate for scrollbar with padding

[mrleblanc101]

Clear and concise description of the problem

Currently, locking the window scroll move the page content because the viewport becomes larger.

Suggested solution

Add an option to compensate by adding padding to the element (html/body) like other popular packages: https://www.npmjs.com/package/body-scroll-lock#reservescrollbargap

Alternative

Wrap this in a composable that does it manually

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[mrleblanc101]

Other alternative, use https://developer.mozilla.org/en-US/docs/Web/CSS/scrollbar-gutter
But it is not supported in Safari yet, and even when it land it won't solve the problem for anyone that has not updated