refactor: Restructure the fetchers code to not use more memory than needed

Also fixes: #92

scrapling/fetchers/requests.py

@@ -0,0 +1,36 @@
+from scrapling.core._types import (
+    Callable,
+    Dict,
+    List,
+    Optional,
+    SelectorWaitStates,
+    Iterable,
+)
+from scrapling.engines.static import (
+    FetcherSession,
+    FetcherClient as _FetcherClient,
+    AsyncFetcherClient as _AsyncFetcherClient,
+)
+from scrapling.engines.toolbelt.custom import BaseFetcher, Response
+
+
+__FetcherClientInstance__ = _FetcherClient()
+__AsyncFetcherClientInstance__ = _AsyncFetcherClient()
+
+
+class Fetcher(BaseFetcher):
+    """A basic `Fetcher` class type that can only do basic GET, POST, PUT, and DELETE HTTP requests based on `curl_cffi`."""
+
+    get = __FetcherClientInstance__.get
+    post = __FetcherClientInstance__.post
+    put = __FetcherClientInstance__.put
+    delete = __FetcherClientInstance__.delete
+
+
+class AsyncFetcher(BaseFetcher):
+    """A basic `Fetcher` class type that can only do basic GET, POST, PUT, and DELETE HTTP requests based on `curl_cffi`."""
+
+    get = __AsyncFetcherClientInstance__.get
+    post = __AsyncFetcherClientInstance__.post
+    put = __AsyncFetcherClientInstance__.put
+    delete = __AsyncFetcherClientInstance__.delete