[PascalNun]

Summary

• bump RhinoSpatial and Yak package metadata to 0.3.3-alpha
• add release notes and update README, scope, roadmap, and Food4Rhino copy
• include the changelog in both distribution formats
• add macOS CI for the release build and deterministic sandbox checks

Verification

• dotnet build RhinoSpatial.sln -c Release --no-restore
• ogc-request-check
• reference-source-check
• tiles-selection-check
• python3 -m json.tool examples/sources.json
• built and inspected RhinoSpatial-0.3.3-alpha.zip
• built and inspected rhinospatial-0.3.3-rh8_0-mac.yak
• loaded the staged Yak assembly and core dependency in Rhino 8 / Grasshopper

Before merge

• GitHub Actions validation passes
• packaged plugin smoke-tested in Rhino 8
• release asset checksums retained for publication