feat: restructure repo into a proper Python tool/library

.gitlab-ci.yml

@@ -5,9 +5,9 @@ stages:
 variables:
   BUILD_ENV_DOCKER_IMAGE: docker-registry.ebrains.eu/esd/tmp:latest
 
-#before_script:
-#  - python -m ensurepip --upgrade
-#  - python -m pip install --upgrade pip
+before_script:
+  - python -m ensurepip --upgrade
+  - python -m pip install --upgrade pip
 
 #build-spack-env-on-runner:
 #  stage: build