[Community] Publish coordinated open-source and accessibility announcements

[KeyffMS]

Parent project: #95
Depends on: #96, #98, #100, #103, #104, #110

Objective

Create several independent, useful and non-spam public references to SightAdapt in communities where the project is relevant.

Candidate channels

• GitHub Discussions or repository announcement.
• Show HN.
• Relevant Reddit communities.
• Accessibility and low-vision communities.
• Windows and .NET communities.
• Polish open-source and .NET communities.
• Maintained awesome-* accessibility lists.
• A technical article about the Windows Magnification API implementation.

Acceptance criteria

• Prepare one canonical announcement package with title, short description, long description, screenshots and URLs.
• Tailor each post to the community instead of cross-posting identical promotional text.
• Lead with the open-source value and technical/use-case information.
• Link to the canonical website and repository.
• Clearly state alpha status, supported platforms and known limitations.
• Avoid medical claims, exaggerated compatibility claims and requests for artificial engagement.
• Follow each community's promotion and self-posting rules.
• Publish only where the project is relevant and where maintainers can respond to feedback.
• Record publication URLs and dates in the project tracker.
• Convert reproducible defects and feature requests into GitHub issues.
• Update or correct posts if the canonical download is withdrawn or the project name changes.

Deliverable

A public announcement log containing channel, date, URL, version announced and follow-up status.