feat: update version nr with composer version nr

[ahuininga-orisha]

Summary

• Replaced the hardcoded Tweakwise version vx.x.x comment in the admin General settings group with a dynamic label field that reads the version from the installed Composer package at runtime.
• Added Model/Config/Comment/Version.php, implementing Magento\Config\Model\Config\CommentInterface, which uses ComposerInformation::getInstalledMagentoPackages() to resolve the version of tweakwise/magento2-tweakwise — the same mechanism already used by Cron/Version.php for the User-Agent string.
• The version no longer needs to be manually updated on each release.

How to test

Scenario 1 — Version displays correctly in the admin

1. Log in to the Magento admin.
2. Navigate to Stores > Configuration > Tweakwise > General.
3. Verify a Module version field is visible showing the current installed version (e.g. Tweakwise version 9.x.x), matching the version in composer.lock for tweakwise/magento2-tweakwise.
4. Switch to a website or store scope and confirm the version field is still visible.

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Scenario 2 — Version matches composer

1. Run composer show tweakwise/magento2-tweakwise from the Magento root.
2. Note the versions value.
3. Confirm it matches what is displayed in the admin field from Scenario 1.

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