Devlog #3 - Improved the code formatting

I divided the the working of the code into different pipelines
I also added new folders to organize everything I added the folders UI and tools to organize the pipelines

I divided the tools from the main Canvas.py to sub scripts in the Tools Folder, like base_tool.py and pen_tool.py
Then in canvas.py I added a simple method to check the current active tool and how to call it actively.