Dialogy

- [x] feat: LBPlugin a Duckling extension that has dedicated selection strategies for date, time and datetime.

- [x] feat: conditional latent entities.

- [x] feat: WER calibration plugin.

- [x] fix: ListEntityPlugin performed aggregation over entities twice leading to lesser than actual scores.

- [x] **fix: Workflow is thread safe.**
- [x] fix: Merge asr plugin on non-json inputs crashes workflow runs.
- [x] feat: Canonicalization plugin.
- [x] update: DucklingPlugin, ListEntityPlugin have transform methods.
- [x] docs: Explain plugins in terms of workflow lifecycle.

- [x] update: dialogy cli has updated project creation and migration.
- [x] add: dialogy cli can also train and test workflows.