Add S3Dlib (#157)

* create s3dlib.yml

* create s3dlib.yml

* pre-commit.ci autofix

pre-commit.ci autofix

* add new line at end

* removed CR

Author: fzaverl

packages/s3dlib.yml

@@ -0,0 +1,7 @@
+name: S3Dlib
+repo: fzaverl/s3dlib
+section: Plot types
+description: 3D surface and line object classes.
+site: https://s3dlib.org
+keywords: [3D-visualization, surface, lines, colormaps]
+pypi_name: s3dlib