v0.1.1

Changed

• Reworked the public README with a project banner, compatibility matrix, quick start, command
  reference and clearer preview-status messaging.
• Added the MIT licence, contribution guide, support policy, code of conduct, security policy,
  issue forms, pull request template and release runbook.
• Hardened GitHub Actions with immutable action SHAs, least-privilege permissions, wrapper
  validation, concurrency limits, exact artifact selection and SHA-256 release checksums.
• Made every Gradle archive reproducible, added implementation metadata to jar manifests and
  embedded the TerraForge licence in distributable jars.
• Added tag-driven Modrinth publishing for the Paper plugin.

Fixed

• Fail closed when the prepared DEM directory cannot be opened instead of continuing with a
  partially initialized plugin.
• Reject configured data paths that escape the TerraForge plugin directory.