v2.2.0 Major improvement for ABS clustering algorithm

The code repo structure is updated and the performance of ABS clustering method is significantly improved, targeting 120,000,000 hits/sec.

What's Changed

• add doi link from zenodo by @suannchong in #1
• migrate license to top level by @suannchong in #2
• Create CODE_OF_CONDUCT.md by @KedoKudo in #8
• Create CONTRIBUTING.md by @KedoKudo in #9
• update next with main by @KedoKudo in #10
• Add pr template by @KedoKudo in #11
• add CI configuration by @KedoKudo in #12
• add unit test on mac os by @KedoKudo in #13
• add openssf badge by @KedoKudo in #14
• Restructure build system to use sub-packages by @KedoKudo in #15
• Improve abs efficiency by @KedoKudo in #17

New Contributors

• @suannchong made their first contribution in #1
• @KedoKudo made their first contribution in #8

Full Changelog: v2.1.0...v2.2.0