Update VS Code tutorial section with p5.js 2.x Project Generator extension

[IrtizaNasar]

Updates the VS Code section of the "Setting Up Your Environment" tutorial to integrate the p5.js 2.x Project Generator extension.

Changes Made:

• Added extension installation instructions with marketplace link and documentation
• Added extension benefits section highlighting key features (IntelliSense, autocomplete, parameter hints)
• Enhanced project creation workflow with two methods:
  • Command Palette method (Ctrl+Shift+P)
  • Explorer context menu method (right-click)
• Updated canvas size from 400x400 to 800x600 for better demonstration visibility
• Improved step-by-step flow to match existing tutorial structure

Extension Features Highlighted:

• Quick project setup with p5.js 2.0
• IntelliSense and autocomplete for p5.js functions
• Online/offline library options
• Parameter hints for most p5.js functions

Related:

This complements the library addition PR for the same extension, providing users with comprehensive setup instructions.

Extension links:

• GitHub: https://github.com/IrtizaNasar/p5-2.vscode
• VS Code Marketplace: https://marketplace.visualstudio.com/items?itemName=Irti.p5js-project-generator