feat: add Prasoon Lawania and team submission - Python-Pet, Pixel-Art Canvas, Code-Invaders & Cyberpunk Theme

[Prasoonlawania]

Summary

This pull request contains the summer internship contribution by Prasoon Lawania and Team under summership-26-prs/Prasoon Lawania/.

It introduces three interactive, gamified learning playgrounds that teach fundamental Python logic (conditionals, loops, and coordinates) through visual feedback, wrapped in a unified Cyberpunk Space Arcade dark theme.

Features Added

1. 🦖 Python-Pet (Tamagotchi Autopilot) — /pet

• Students write Python conditionals (if-elif-else) to automate the care and health of a virtual pixel-art dinosaur pet.
• 10-day survival check with dynamic state decay (hunger, energy, happiness).
• Animated SVG dinosaur reacting in real-time (eating, sleeping, playing, crying when sad, collapsing when neglected).

2. 🎨 Pixel-Art Canvas (Generative Grid) — /pixel

• Students write nested loops and conditional statements to paint designs on a 16x16 neon pixel grid.
• Includes algorithmic challenges (Checkerboard, Outer Border Frame, Diagonal Cross X).
• Features automated coordinate validation and offline PNG image export.

3. 🛸 Code-Invaders (Retro Space Invaders Autopilot) — /invaders

• Real-time 2D canvas shooter where students write Python algorithms to steer a spaceship shield and shoot falling alien invaders.
• Exposes live coordinate vectors (ship.x, invader.x, invader.y) and actions (ship.move_left(), ship.move_right(), ship.shoot()) to Pyodide.

4. 🎨 Global Cyberpunk Theme Overhaul

• High-contrast space obsidian background (#070a0e) with electric cyan (#00f3ff), synthwave pink (#ff007f), and neon green (#39ff14) accents across all pages and curriculum views.

Verification

• Built and verified with npm run build with zero errors.
• Runs 100% offline-first using in-browser WebAssembly Pyodide runtime.
• Seeded scenarios database intact and operational.