feat: add poc

src/core/System.js

@@ -0,0 +1,45 @@
+/**
+ * Base System class for ECS architecture
+ * Systems contain logic that operates on entities with specific components
+ */
+export class System {
+  constructor(name) {
+    this.name = name;
+    this.requiredComponents = [];
+    this.priority = 0; // Lower priority runs first
+  }
+
+  /**
+     * Check if an entity matches this system's requirements
+     */
+  matches(entity) {
+    if (!entity.active) return false;
+    return this.requiredComponents.every(componentType =>
+      entity.hasComponent(componentType)
+    );
+  }
+
+  /**
+     * Update method - override in subclasses
+     */
+  update(deltaTime, entities) {
+    // Filter entities that match this system's requirements
+    const matchingEntities = entities.filter(entity => this.matches(entity));
+    this.process(deltaTime, matchingEntities);
+  }
+
+  /**
+     * Process matching entities - override in subclasses
+     */
+  process(_deltaTime, _entities) {
+    // Override in subclasses
+  }
+
+  /**
+     * Called when system is added to engine
+     */
+  init(engine) {
+    this.engine = engine;
+  }
+}
+