Update dependencies in pyproject.toml and upgrade codecov-action in GitHub Actions workflow

Update GitHub Actions workflow to use latest action versions

Update version reference in README for copier command

Update permissions in settings.local.json and enhance devcontainer mounts in test utilities

Store claude credentials for own container

Add volume definition for claude-code-config in Docker Compose and update devcontainer mounts

Refactor GitHub Actions workflow to use consistent Docker tag environment variable

Better branch handling for ghcr

Remove gitlens

Reduce docker image size

Optimize Dockerfile and .dockerignore for improved build context and environment setup

Fix python interpreter path

Rename template from poetry-copier to uv-copier

Exec git add in the test flow

Adapt test flow