create documentation thread

src/backend/documentation_thread.py

@@ -0,0 +1,11 @@
+from PyQt6.QtCore import QThread
+from src.utils.documentation import run_mkdocs
+
+
+class DocumentationThread(QThread):
+    def __init__(self):
+        super().__init__()
+
+    def run(self):
+        # launch_documentation()
+        run_mkdocs()