Added CI pipeline

.gitlab-ci.yml

+stages:
+  - linting
+
+# Official language image. Look for the different tagged releases at:
+# https://hub.docker.com/r/library/python/tags/
+image: python:latest
+
+# Change pip's cache directory to be inside the project directory since we can
+# only cache local items.
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+  VENV_DEV: ".venv"
+
+# Pip's cache doesn't store the python packages
+# https://pip.pypa.io/en/stable/topics/caching/
+#
+# If you want to also cache the installed packages, you have to install
+# them in a virtualenv and cache it as well.
+cache:
+  - key: pip_cache
+    paths:
+      - .cache/pip
+    when: always
+  - key: "$CI_PIPELINE_ID"  # only used for one pipeline
+    paths:
+      - $VENV_DEV
+    when: always
+
+before_script:
+  - python --version  # For debugging
+  - |- 
+      if [ ! -d $VENV_DEV ]; then
+          python3 -m venv $VENV_DEV
+          source $VENV_DEV/bin/activate
+          python3 -m pip install -r requirements-dev.txt
+      else 
+          source $VENV_DEV/bin/activate
+      fi
+
+isort:
+  stage: linting
+  dependencies: []
+  script:
+    - isort . --check-only
+
+black:
+  stage: linting
+  dependencies: []
+  script:
+    - black --check .

pyproject.toml

+[tool.isort]
+profile = "black"

requirements-dev.txt

+-r requirements.txt
+black==23.1.0
+isort==5.10.1
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