Refactor Home Assistant API and schema validation

- Completely rewrote HassInstance class with fetch-based API methods
- Updated Home Assistant schemas to be more precise and flexible
- Removed deprecated test environment configuration file
- Enhanced WebSocket client implementation
- Improved test coverage for Home Assistant API and schema validation
- Simplified type definitions and error handling

src/types/hass.ts

@@ -0,0 +1,50 @@
+export interface AuthMessage {
+    type: 'auth';
+    access_token: string;
+}
+
+export interface ResultMessage {
+    id: number;
+    type: 'result';
+    success: boolean;
+    result?: any;
+}
+
+export interface WebSocketError {
+    code: string;
+    message: string;
+}
+
+export interface Event {
+    event_type: string;
+    data: any;
+    origin: string;
+    time_fired: string;
+    context: {
+        id: string;
+        parent_id: string | null;
+        user_id: string | null;
+    };
+}
+
+export interface Entity {
+    entity_id: string;
+    state: string;
+    attributes: Record<string, any>;
+    last_changed: string;
+    last_updated: string;
+    context: {
+        id: string;
+        parent_id: string | null;
+        user_id: string | null;
+    };
+}
+
+export interface StateChangedEvent extends Event {
+    event_type: 'state_changed';
+    data: {
+        entity_id: string;
+        new_state: Entity | null;
+        old_state: Entity | null;
+    };
+}