Prepare release notes and versioning for the first public release

[eneskemalergin]

Summary

The repository would benefit from a clear first public release with versioned notes.

Tasks

• decide on a first public release version
• draft short release notes summarizing current scope
• verify that citation metadata and README links match the release state

Acceptance criteria

• there is a clear first public release target
• release notes describe what users can expect from the current version

Why this matters

Release notes make the repository feel maintained and easier to cite.