514-make linting optional

[fdiblen]

Description

• I have read the contribution guidelines
• This update is in line with what is recommended in the Python chapter of the Guide
• All user facing changes have been added to CHANGELOG.md

This PR makes linting integration optional.

Related issues:

• Add a question about linting #514

Install the requirements

cd $(mktemp -d --tmpdir py-tmpl-XXXXXX)
pip install pipx
pipx install copier

Test 1:

Step-1:
Run the command below and say 'yes' to Add linting? question

copier copy --vcs-ref 514_linting https://github.com/nlesc/python-template test_yes

Step-2:
Run the command below and say 'no' to Add linting? question

copier copy --vcs-ref 514_linting https://github.com/nlesc/python-template test_no

What to check:

• You should see the files below only when you say 'yes':
  • .github/workflows/next_steps_linting.yml
  • .github/workflows/next_steps_linting_issue.md
• Check if there are mentions of linting or linter in any file of the generated package.

Test 2:

• Push the generated package to a GitHub repository
• Check if next_steps_linting.yml workflow runs
• Check if next_steps_linting.yml workflow is removed after a successful run
• Check if a GitHub issue about linting is created

[sjvrijn]

Looks good to me 👍

[lyashevska]

Works as expected!