Vivarium

- Type-hinting: Fix mypy errors in vivarium/framework/results/interface.py
- Type-hinting: Fix mypy errors in vivarium/component.py
- Type-hinting: Fix mypy errors in vivarium/framework/results/observer.py

- Fix type hints for pandas groupby objects

- Feature: Allow users to define initialization weights as LookupTableData or an artifact key
- Feature: Make State's add_transition function return the Transition
- Feature: Add triggered argument to State's add_transition function
- Type-hinting: Introduce DataInput type
- Type-hinting: Fix mypy errors in vivarium/framework/results/manager.py
- Type-hinting: Fix mypy errors in vivarium/framework/lookup/manager.py

- Feature: Enable adding transition to a state by defining the output state and the transition probability

- Fix mypy errors in vivarium/framework/results/context.py
- Fix mypy errors in vivarium/framework/time.py
- Modernize type hinting
- Remove unnecessary "from future import annotation" imports

- Feature: Supports passing callables directly when building lookup tables
- Feature: Enables columns and pipelines to specify dependencies directly, instead of by name
- Feature: Enables identification of which component produced a Pipeline or RandomnessStream
- Bugfix: Enables Machine to be used directly to model a state machine
- Bugfix: Ensures that a Pipeline will always have a name
- Bugfix: Appropriately declares dependencies in example models
- Testing: Adds coverage for example DiseaseModel
- Refactor: Converts resource module into a package
- Refactor: Converts values module into a package
- Refactor: Simplifies code to allow Managers to create columns
- Refactor: Converts ResourceManager __iter__ to a well-named instance method
- Refactor: Creates ResourceTypes for each type of resource
- Refactor: Makes Pipeline and RandomnessStream inherit from Resource
- Refactor: Creates ValueSource and ValueModifier resources and attaches them to Pipelines