add scalex (#164)

* add scalex

packages/SCALEX/meta.yaml

@@ -0,0 +1,19 @@
+name: SCALEX
+description: |
+  SCALEX is an integration and projection tool for atlas-level single-cell RNA-seq and ATAC-seq data.
+project_home: https://github.com/jsxlei/SCALEX
+documentation_home: https://scalex.readthedocs.io/en/latest/?badge=stable
+publications:
+  - 10.1038/s41467-022-33758-z
+install:
+  pypi: SCALEX
+tags:
+  - scRNA-seq
+  - integration
+  - projection
+  - scATAC-seq
+license: MIT
+version: v1.0.3
+authors:
+  - Lei Xiong
+test_command: pip install ".[test]" && pytest