Developement enviroment setup on linux ubuntu

[Daeraxa]

I really hope this isn't intended as a GSoC introduction.

Otherwise literally all you need is in CONTRIBUTING.md

About the GSoC category

GSoC has not started so this forum is read only. Please do not create topics how to get started or apply for GSoC. All the necessary info can be found on the webpage referenced below. Do not use another category to introduce yourself. You can do so here, when this category is not read only. All topics related to Google Summer of Code should go into this category. We have an introduction document for new contributors here: Google Summer of Code 2023 | Joplin See in par…