Implement Owen Animation System with core classes, loaders, and state handlers

- Added OwenSystemFactory for creating the animation system.
- Introduced OwenAnimationContext to manage animations and states.
- Created AnimationLoader and GLTFAnimationLoader for loading animations.
- Developed state handlers: WaitStateHandler, ReactStateHandler, TypeStateHandler, SleepStateHandler.
- Implemented StateFactory for managing state handlers.
- Defined constants for clip types, states, and emotions.
- Added type definitions for TypeScript support.
- Configured Vite for building and serving the project.
- Added licenses (dual) to project.

src/constants.js

@@ -0,0 +1,78 @@
+/**
+ * @fileoverview Animation system constants and enumerations
+ * @module constants
+ */
+
+/**
+ * Animation clip types based on naming convention
+ * @readonly
+ * @enum {string}
+ */
+export const ClipTypes = {
+    /** Loop animation */
+    LOOP: 'L',
+    /** Quirk animation */
+    QUIRK: 'Q',
+    /** Nested loop animation */
+    NESTED_LOOP: 'NL',
+    /** Nested quirk animation */
+    NESTED_QUIRK: 'NQ',
+    /** Nested in transition */
+    NESTED_IN: 'IN_NT',
+    /** Nested out transition */
+    NESTED_OUT: 'OUT_NT',
+    /** Transition animation */
+    TRANSITION: 'T',
+};
+
+/**
+ * Character animation states
+ * @readonly
+ * @enum {string}
+ */
+export const States = {
+    /** Waiting/idle state */
+    WAIT: 'wait',
+    /** Reacting to input state */
+    REACT: 'react',
+    /** Typing response state */
+    TYPE: 'type',
+    /** Sleep/inactive state */
+    SLEEP: 'sleep',
+};
+
+/**
+ * Character emotional states
+ * @readonly
+ * @enum {string}
+ */
+export const Emotions = {
+    /** Neutral emotion */
+    NEUTRAL: '',
+    /** Angry emotion */
+    ANGRY: 'an',
+    /** Shocked emotion */
+    SHOCKED: 'sh',
+    /** Happy emotion */
+    HAPPY: 'ha',
+    /** Sad emotion */
+    SAD: 'sa',
+};
+
+/**
+ * Default configuration values
+ * @readonly
+ * @type {Object}
+ */
+export const Config = {
+    /** Default fade in duration for animations (ms) */
+    DEFAULT_FADE_IN: 0.3,
+    /** Default fade out duration for animations (ms) */
+    DEFAULT_FADE_OUT: 0.3,
+    /** Default quirk interval (ms) */
+    QUIRK_INTERVAL: 5000,
+    /** Default inactivity timeout (ms) */
+    INACTIVITY_TIMEOUT: 60000,
+    /** Quirk probability threshold */
+    QUIRK_PROBABILITY: 0.3,
+};