build: don't use local dependencies, and remove backend package: hatch doesn't support yet editable dependencies (https://github.com/pypa/hatch/issues/588), and to work on dev, backend and templates must be installed manually in dev mode. To avoid issues during sync when entering a shell, those dependencies are disabled and must be installed manually.

syntax: glob
.build
build
ctags_links/
dist/
.eggs/
env/
MANIFEST
.mypy_cache/
*.orig
*.pyc
*.pyo
.pytest_cache
*.pyv
Session.vim
stubs/
*.swo
*.swp
tags
tests/e2e/report*
_trial_temp/
twistd.log
twistd.pid
twisted/plugins/dropin.cache
*.un~
.vim
.vscode