feat: add .env support

For #2 (closed)

What does this MR do?

Adds some .env support using python-dotenv. Fairly self explanatory, but for the uninitiated:

• you can provide your secrets / environment variables in a .env file. Don't commit the .env to the repo.
• when running the ucam-gitlab-stats API, you can either provide the token as an env var, or put it in the .env.

Checks

Added a .env file with GITLAB_TOKEN=... then ran the following locally:

poetry run ucam-gitlab-stats --labels "team::Identity" --print-iterations --week-count=13 14

All worked as expected

added issuetypeTask teamDevOps labels

assigned to @bw509

added 1 commit

• c0c26be7 - chore(doc): newline at end of changelog.md

Compare with previous version

changed the description

requested review from @ek599

I have to confess to not loving .env files... but not enough to block this and we do use it with other tooling, so the team as a whole likes it :)

approved this merge request

mentioned in commit 97e27044

merged