Virtool-workflow

Added
- add analysis fixture to provide file upload capability (91)
- add indexes fixture to provide simple access to reference indexes used in an analysis workflow (94)

Changed
- provide more discrete fixtures instead of `analysis_args` (90)
- rename `temp_path` fixture to `work_path`
- remove `temp_analysis_path` fixture
- update fixtures documentation (90)

Added
- implement logging (66)
- add `runtime` pytest fixture to simplify workflow step testing (84)
- add `hmms` workflow fixture

Changed
- remove direct database access to make move to database-less workflows smoother (69)
- greatly improved documentation fixtures and hooks (74)

Removed
- drop `run-local` sub-command

Added
- add `reads` fixture for using prepared sequencing read data used in an analysis workflow
- add `run_subprocess` fixture for executing command line tools
- add `subtractions` fixture for accessing subtractions selected by the user when the workflow job was created

Changed
- update documentation

Added
- add `job_args` fixture (59)
- add `proc` and `mem` fixtures
- add complete list of fixtures to documentation
- add base Dockerfile

Fixed
- remove `uvloop` dependency as it was causing problems in Python 3.9 (55)

Changed
- allow opt-out of `uvloop` during workflow execution
- print workflow results on console when in development mode

Fixed
- fix exception due to not installing `virtool-core` from PyPI

Fixed
- update quick start documentation to reflect current package API