feat: add templates for linting tools

templates/lint/black.yml

+---
+black:
+  before_script:
+    - pip install tox
+  stage: lint
+  script: tox -e black

templates/lint/check-manifest.yml

+---
+check-manifest:
+  before_script:
+    - pip install tox
+  stage: lint
+  script: tox -e check-manifest

templates/lint/flake8.yml

+---
+flake8:
+  before_script:
+    - pip install tox
+  stage: lint
+  script: tox -e flake8

templates/lint/mypy.yml

+---
+mypy:
+  before_script:
+    - pip install tox
+  stage: lint
+  allow_failure: true
+  script: tox -e mypy

templates/lint/yamllint.yml

+---
+yamllint:
+  before_script:
+    - pip install tox
+  stage: lint
+  rules:
+    - changes:
+        - "**/*.yaml"
+        - "*.yaml"
+        - "**/*.yml"
+        - "*.yml"
+  script:
+    - tox -e yamllint