feat: add dependabot.yml for weekly updates of GitHub Actions
chore: update Python version from 3.11 to 3.12 in .mise.toml and pyproject.toml
chore: update various dependencies in pyproject.toml to their latest versions
feat: add dependency-review.yml for automated dependency review on pull requests and weekly schedule
feat: add docker-compose.yml for setting up bot and postgres services in Docker environment
