Align the drifted license headers and turn the license check on [ignore_release]

[snake14]

Description

Some source files carried a licence header that disagrees with the licence this plugin's plugin.json declares — in premium repositories a GPL header, in open-source ones an InnoCraft EULA header. The licence check was therefore opted out when this plugin moved onto the shared umbrella.

Each header is replaced with the one its own repository already uses, copied verbatim from a compliant sibling file rather than composed, so the wording stays this repository's own. The changes are comment-only, so there is no version bump and no changelog entry.

With the headers aligned the check reports no errors, and the skip-license-check opt-out comes off.

Issue No

No GitHub issue.

Steps to Replicate the Issue

1. Run the licence check against this plugin.
2. Expected result: every source file carries the header matching the declared licence.
3. Actual result: some files carry the opposite licence's header.

Checklist

• [✔] Tested locally or on demo2/demo3?
• [NA] New test case added/updated?
• [NA] Are all newly added texts included via translation?
• [NA] Are text sanitized properly? (Eg use of v-text v/s v-html for vue)
• [NA] Version bumped?
• [✔] I have understood, reviewed, and tested all AI outputs before use
• [✔] All AI instructions respect security, IP, and privacy rules
• [NA] Documentation updated?