Implementing electronic whiteboard based on konva.js

• [Konva] Responsible for the overall canvas container and drawing each node (line, arrow, rectangle, circle, etc.) https://konvajs.org
• [perfect-freehand] Draw freeform brushes (pencils, highlighters, etc.) https://www.perfectfreehand.com

• [Excalidraw] Reference https://excalidraw.com/