wip: dir organisation, script cleanup

scripts/install/11-python.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+export PYTHON_KEYRING_BACKEND=keyring.backends.null.Keyring
+
+if not_installed "pip3"; then
+    pyenv install 3.9.0
+    pyenv global 3.9.0
+    refresh
+fi
+
+pip install --upgrade pip
+pip3 install --upgrade pip
+python3 --version
+pip3 --version