[ci] Run isort

Add running isort to the CI to ensure consistent library import in
Python files.

Run isort to fix the current issues in `vbox-adapter-check.py`.

Author: Ana06

.github/workflows/linter.yml

@@ -12,7 +12,10 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - name: Install black
-        run: pip install black
+      - name: Install dependencies
+        run: pip install black isort
       - name: Run black
         run: black --line-length=120 --check --diff .
+      - name: Run isort
+        run: isort --check --diff .
+

virtualbox/vbox-adapter-check.py

@@ -23,7 +23,6 @@
 
 gi.require_version("Notify", "0.7")
 from gi.repository import Notify
-
 from vboxcommon import *
 
 DYNAMIC_VM_NAME = ".dynamic"