Add speech bubble functionality to Actor class

[Null000]

Summary

Added speech bubble display capability to the Actor class, allowing actors to show temporary or persistent text bubbles above their heads during gameplay.

Key Changes

• Added imports for Graphics and Text from pixi.js to support speech bubble rendering
• Added three new private properties to track speech bubble state:
  • speechBubble: Container holding the bubble graphics and text
  • speechBubbleTimeout: Timer reference for auto-hiding bubbles
  • resolveSpeechBubble: Promise resolver for async bubble display
• Implemented showSpeechBubble(text, duration) method that:
  • Creates a rounded rectangle bubble with a tail pointing downward
  • Renders text with word wrapping (150px width, 14px font)
  • Supports both temporary bubbles (auto-hide after duration) and persistent bubbles (duration = -1)
  • Returns a Promise that resolves when the bubble is hidden
• Implemented hideSpeechBubble() method that:
  • Clears any pending timeout
  • Removes and destroys the bubble from the display tree
  • Resolves the pending Promise if one exists
• Updated update() method to position speech bubbles relative to the actor, accounting for sprite height and screen shake effects

Implementation Details

• Speech bubbles are positioned above the actor's head using pivot point calculations
• Bubbles feature a white background with dark gray border and rounded corners (8px radius)
• The tail is centered and points downward (10px height, 8px width)
• Text is rendered with Arial font and black color, with automatic word wrapping
• Proper cleanup ensures no memory leaks from timeouts or display objects

https://claude.ai/code/session_01H51CcJUAJW28hdAUZT4Rdg