Merge pull request #647 from BDonnot/bd_dev

adding contributing.md and code of conduct [skip ci]

Author: BDonnot

CHANGELOG.rst

@@ -77,6 +77,11 @@ Next release
   instead of raising a warning.
 - [FIXED] some issue with gym_compat module for "newest" version of 
   gymnasium (1.0.0)
+- [FIXED] github ci (v1 and v2 artifact are now deprecated)
+- [ADDED] a code of conduct from github
+- [ADDED] a "CONTRIBUTING.md" files (instead of having contribution instructions 
+  in the readme)
+- [ADDED] numpy 2 support (now that pandapower allows it)
 - [IMPROVED] error message when forecasts are not correctly set-up
 
 [1.10.3] - 2024-07-12

README.md

@@ -262,6 +262,11 @@ For example, the  "getting started" notebooks referenced some pages of the help.
 
 ## Contributing
 
+Please consult the "CONTRIBUTING.md" file for extra information. This is a summary and
+in case of conflicting instructions, follow the one given in the `CONTRIBUTING.md` file
+and discard these ones.
+
+
 We welcome contributions from everyone. They can take the form of pull requests for smaller changed.
 In case of a major change (or if you have a doubt on what is "a small change"), please open an issue first
 to discuss what you would like to change.