Add Lava Clouds browser game

[msfeldstein]

Summary

• Add a standalone canvas game under lava-clouds-game/ inspired by the supplied story.
• Include a cinematic intro: blue jumping suit, lava flood, cloud shop lava suit purchase, crouch/down-shot dive into lava.
• Add playable battles with checkpoints, power-draining enemies, purple antenna people, the metal sphere, King's Hammer, orange prince, animal/turtle powers, and final princess/queen encounter.

Flow

Title
  -> intro scenes
      blue suit jump -> lava flood -> cloud shop -> cloud-to-lava dive
  -> battle loop
      on suit-power loss: reset to current battle checkpoint
      player actions: laser / punch / hammer / throw rescued turtle
      enemy power reaches zero -> story reward -> next battle
  -> ending
      black suit darkness clears
      choose Play Again or placeholder Next Game

Testing

• node --check lava-clouds-game/game.js could not run because this cloud image has no node binary.
• Installed the Python esprima parser in the agent environment only and successfully parsed lava-clouds-game/game.js (1740 lines).