feat: переработать кастомизацию HttpClient

- добавлен плоский ApiConfig с lifecycle hooks
- добавлены ApiError, retry context, timeout и кастомные parser/serializer
- обновлены примеры, документация и тесты под новый API

example.ts

@@ -8,25 +8,23 @@ import { getProfile } from './output/operations/get-profile';
 import { login } from './output/operations/login';
 import { register } from './output/operations/register';
 
-type SecurityData = {
-  token: string;
-};
+let accessToken: string | null = null;
 
-const httpClient = new HttpClient<SecurityData>({
+const httpClient = new HttpClient({
   baseUrl: 'https://api.example.com',
-  baseApiParams: {
-    headers: {
-      'Content-Type': 'application/json',
-    },
+  headers: {
+    'Content-Type': 'application/json',
   },
-  securityWorker: (securityData) => {
-    if (!securityData?.token) {
-      return undefined;
+  onRequest: (params) => {
+    if (!params.secure || !accessToken) {
+      return params;
     }
 
     return {
+      ...params,
       headers: {
-        Authorization: `Bearer ${securityData.token}`,
+        ...params.headers,
+        Authorization: `Bearer ${accessToken}`,
       },
     };
   },
@@ -58,7 +56,7 @@ async function loginUser() {
     password: 'SecurePassword123',
   });
 
-  httpClient.setSecurityData({ token: result.access_token });
+  accessToken = result.access_token;
 
   return result;
 }