Refactor: Remove all GDK dependencies from hidapi package

The hidapi hardware layer must not know or depend on any UI libraries.
Removes all GDK dependencies from the hidapi packages, which makes
testing of these modules easier and removes unwanted cross-dependencies.

Related #2480

lib/hidapi/hidapi_impl.py

@@ -23,10 +23,13 @@ Parts of this code are adapted from https://github.com/apmorton/pyhidapi
 which is MIT licensed.
 """
 
+from __future__ import annotations
+
 import atexit
 import ctypes
 import logging
 import platform
+import typing
 
 from threading import Thread
 from time import sleep
@@ -35,8 +38,9 @@ import gi
 
 from hidapi.common import DeviceInfo
 
-gi.require_version("Gdk", "3.0")
-from gi.repository import GLib  # NOQA: E402
+if typing.TYPE_CHECKING:
+    gi.require_version("Gdk", "3.0")
+    from gi.repository import GLib  # NOQA: E402
 
 logger = logging.getLogger(__name__)
 
@@ -311,13 +315,21 @@ def find_paired_node_wpid(receiver_path, index):
     return None
 
 
-def monitor_glib(callback, filterfn):
+def monitor_glib(glib: GLib, callback, filterfn):
+    """Monitor GLib.
+
+    Parameters
+    ----------
+    glib
+        GLib instance.
+    """
+
     def device_callback(action, device):
         # print(f"device_callback({action}): {device}")
         if action == "add":
             d_info = _match(action, device, filterfn)
             if d_info:
-                GLib.idle_add(callback, action, d_info)
+                glib.idle_add(callback, action, d_info)
         elif action == "remove":
             # Removed devices will be detected by Solaar directly
             pass