Does anyone know any website with like a library of scripts, as like examples for common game features?
Like ¨Here is an example script for movement¨ , ¨Script for procedural beep boops¨ and such.
The closest to that are probably the godot recipes by KidsCanCode: https://kidscancode.org/godot_recipes/
It is not a library of ready-made scripts though. But it will guide you with specific concepts and how to implement them.
Second that. Dont be discouraged by the name, they have the best tutorials for doing basic things in town, as a bonus most of them do not assume heaps of prior knowledge without being condescending. Also would recommend GDQuest and just googling the thing you want, sometimes people on reddit/stackoverflow will happen to be doing something very similar to what you are with someone in the comments suggesting the exact code you needed.
The official documentation has a section called tutorials that also show how to do specific things, from simple logic like how to use a physics body to more complex like networking.
I'm not sure if there is a collection of snippets but almost everything is "plug and play", you can take the character scene and script files from a demo project and use it on your own project without changes in most cases.