Covalent

Added

- Listed common mocking commands in the CONTRIBUTING.md guide.
- Additional guidelines on testing.

Changed

- `backend` metadata name changed to `executor`.
- `_plan_workflow` usage updated to reflect how that executor related information is now stored in the specific executor object.
- Updated tests to reflect the above changes.
- Improved the dispatch cancellation test to provide a robust solution which earlier took 10 minutes to run with uncertainty of failing every now and then.

Removed

- Removed `TaskExecutionMetadata` as a consequence of removing `execution_args`.

Fixed

- Tracking imports that have been used in the workflow takes less time.

Added

- User-imports are included in the dispatch_source.py script. Covalent-related imports are commented out.

Added

- UI: Lattice draw() method displays in web UI
- UI: New navigation panel

Changed

- UI: Animated graph changes, panel opacity

Fixed

- UI: Fixed "Not Found" pages

Added

- RST document describing the expectations from a tutorial.

Added

- Added how to create custom executors

Changed

- Changed the description of the hyperlink for choosing executors
- Fixed typos in doc/source/api/getting_started/how_to/execution/creating_custom_executors.ipynb