Covalent

Changed

- Results directory uses a relative path by default and can be overridden by the environment variable `COVALENT_RESULTS_DIR`.

Changed

- Executor parameters use defaults specified in config TOML
- If relative paths are supplied for stdout and stderr, those files are created inside the results directory

Added

- Sync function
- Covalent CLI tool can restart in developer mode

Fixed

- Updated the UI address referenced in the README

Added

- Quantum gravity tutorial

Changed

- Moved VERSION file to top level

Added

- `error` attribute was added to the results object to show which node failed and the reason behind it.
- `stdout` and `stderr` attributes were added to a node's result to store any stdout and stderr printing done inside an electron/node.
- Test to verify whether `stdout` and `stderr` are being stored in the result object.

Changed

- Redesign of how `redirect_stdout` and `redirect_stderr` contexts in executor now work to allow storing their respective outputs.
- Executors now also return `stdout` and `stderr` strings, along with the execution output, so that they can be stored in their result object.

Added

- Added an attribute `__code__` to electron and lattice which is a copy of their respective function's `__code__` attribute.
- Positional arguments, `args`, are now merged with keyword arguments, `kwargs`, as close as possible to where they are passed. This was done to make sure we support both with minimal changes and without losing the name of variables passed.
- Tests to ensure usage of positional arguments works as intended.

Changed

- Slight rework to how any print statements in lattice are sent to null.
- Changed `test_dispatcher_functional` in `basic_dispatcher_test.py` to account for the support of `args` and removed a an unnecessary `print` statement.

Removed

- Removed `args` from electron's `init` as it wasn't being used anywhere.