Add DOI

What's Changed

• Can solve multiple variants of packing problems
• CI, some tests
• Add DOI

Full Changelog: https://github.com/ktnr/BinPacking2D/commits/v0.9.0

Stable pre-release

What's Changed

• Can solve multiple variants of packing problems
• CI, some tests

Full Changelog: https://github.com/ktnr/BinPacking2D/commits/v0.9.0