Added venv support to install command

src/cpl_cli/configuration/venv_helper_service.py

@@ -0,0 +1,15 @@
+import os
+import subprocess
+import sys
+
+
+class VenvHelper:
+
+    @staticmethod
+    def create_venv(path):
+        subprocess.run(
+            [sys.executable, '-m', 'venv', os.path.abspath(os.path.join(path, '../../'))],
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL,
+            stdin=subprocess.DEVNULL
+        )