Using pluggy for managing Plugins

Enhancement proposal

Pluggy: https://pluggy.readthedocs.io/

Currently how out plugin system works is

• Get the list of plugins from the user config file
• Add them to the global namespace, so when the user does from manim import * the plugin will also be imported.
• Has no possible way to extend parts of the library without monkey patching or making a new subclass out of the original one. See how manim-onlinetex does this currently, https://github.com/ManimCommunity/manim-onlinetex/blob/38ed76c55f387e9205beeb28307a634b46691df1/src/manim_onlinetex/manim_onlinetex.py#L109

With pluggy in place, we can decide the parts of the library which can be extendable without subclassing, see an example. https://pluggy.readthedocs.io/en/latest/#a-toy-example And it feels like we shouldn't reinvent the wheel rather than using something which is already available.

Additional comments

This would kinda require all the plugins to update to use pluggy. Let the previous implementation of importing to global namespace stay, for backward compatibility.

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Proof of concept

• #2635