Since no release has been published in ~11 months, install monarchmoney
directly from git main branch which contains the fix for flexible budgets.
Also updates gql to >=4.0 as required by the main branch.
Change from requirements.txt to pyproject.toml as source of truth for
dependencies. This ensures pyotp is properly installed in the Docker image
when built. Using 'uv pip install -e .' will install the package
with all dependencies from pyproject.toml.
