What's Changed
* new linter: ruff by ismael-mendoza in https://github.com/LSSTDESC/BlendingToolKit/pull/481
* Fix drawing COSMOS galaxies by ismael-mendoza in multilpe PRs:
- https://github.com/LSSTDESC/BlendingToolKit/pull/482
- https://github.com/LSSTDESC/BlendingToolKit/pull/485
* Fix numpy deprecation warning by ismael-mendoza in https://github.com/LSSTDESC/BlendingToolKit/pull/483
* Throw a more understandble error when producing too many sources in a deblender by ismael-mendoza in https://github.com/LSSTDESC/BlendingToolKit/pull/484
* update galcheat by ismael-mendoza in https://github.com/LSSTDESC/BlendingToolKit/pull/486
* Add user guide by ismael-mendoza in https://github.com/LSSTDESC/BlendingToolKit/pull/487
**Full Changelog**: https://github.com/LSSTDESC/BlendingToolKit/compare/1.0.0b6...1.0.0b7