Resolve laravel-mfa package stability

[coding-libs]

Remove version field from composer.json to enable proper stable release tagging via Git.

This change is part of a larger fix to allow the package to be recognized as stable by Packagist. Packagist prefers to derive package versions from Git tags rather than a static version field in composer.json. Removing this field, in conjunction with pushing a v1.0.0 Git tag, allows the package to be installed by consumers with minimum-stability: stable.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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