v0.6.0 - Remove ECS Dependency

Breaking Changes

• Removed zig-ecs dependency entirely - The library no longer depends on external ECS
• ECS-based Engine API removed - Use VisualEngine instead

Changes

• VisualEngine is now the primary and only sprite management API
• Engine namespace now only provides static Input/UI helpers (gfx.Engine.Input, gfx.Engine.UI)
• Effect types (Fade, TemporalFade, Flash) now have built-in update() methods
• Added getDisplayColor() to Flash effect
• All examples (01-09) migrated to VisualEngine pattern
• Updated documentation to reflect new architecture

Migration Guide

Replace ECS-based Engine usage with VisualEngine:

// Before (ECS-based - no longer supported)
var registry = ecs.Registry.init(allocator);
var engine = try gfx.Engine.init(allocator, &registry, .{...});
const player = registry.create();
registry.add(player, gfx.Position{...});

// After (VisualEngine)
var engine = try gfx.VisualEngine.init(allocator, .{
    .window = .{ .width = 800, .height = 600, .title = "My Game" },
});
const player = try engine.addSprite(.{
    .sprite_name = "player_idle",
    .x = 400, .y = 300,
});

// Use static helpers for input/UI
if (gfx.Engine.Input.isDown(.left)) { ... }
gfx.Engine.UI.text("Hello", .{ .x = 10, .y = 10, .size = 20, .color = gfx.Color.white });

Full Changelog

v0.5.0...v0.6.0