update readthedocs config

Switch over from `gym` to `gymnasium` (#20)

* from gym to gymnasium in code

* update readme

* update seeding, reset, and render modes

* from old to new reset/step API

* update custom env example

* all examples updated

* update documentation

* update poetry lockk

* run black

* fix dcopf tests

* update github action checks

* test with only python 3.11

* test with only python 3.13

* bump up numpy and pandas

* np.Inf to np.inf, reset all python test versions in github actions

* poetry 1.4 to 1.8 in ci_release

* update required python version + status badge

* add seed to reset() in docs example

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Co-authored-by: Robin Henry <[email protected]>

setup dynamic versioning

upgrade poetry to 1.4 in actions (#18)

update lock file

bump up version

update version tag number

add quotes to python version in release actions

update readme

Merge pull request #5 from robinhenry/hotfix/doc-update

Add if `__name__ == ...` guards to examples for windows multiprocessing bug