feat: workflow authoring and management support

[mikeee]

Implements Workflow authoring using durabletask-go and also an interface to the dapr grpc management endpoints.

Contributes towards the completion of dapr/dapr#7156 and closes #379

This PR also exposes the GRPC connection from the dapr client.

Requires documentation in https://github.com/dapr/docs/pull/3895

• [x] Testing implemented (E2E)
• [x] Checks/Tests passing
• [x] Documentation updated/improved

[codecov[bot]]

Codecov Report

Attention: 290 lines in your changes are missing coverage. Please review.

Comparison is base (cefbadb) 70.11% compared to head (6f5aa89) 59.37%. Report is 1 commits behind head on main.

Files	Patch %	Lines
examples/workflow/main.go	0.00%	182 Missing :warning:
workflow/client.go	50.61%	38 Missing and 2 partials :warning:
workflow/worker.go	55.38%	25 Missing and 4 partials :warning:
workflow/workflow.go	54.16%	21 Missing and 1 partial :warning:
workflow/context.go	50.00%	17 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #487 +/- ## =========================================== - Coverage 70.11% 59.37% -10.74% =========================================== Files 35 54 +19 Lines 2884 3483 +599 =========================================== + Hits 2022 2068 +46 - Misses 748 1293 +545 - Partials 114 122 +8 ```

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[mikeee]

Implemented the workflow authoring client.

[yaron2]

Amazing! Thanks @mikeee for adding the authoring code.

[yaron2]

@cgillum for review

[mikeee]

Apologies for the excess formatting - need to tone down the nvim plugins.

[famarting]

do you know if its possible to add support for setting custom statuses? like here https://github.com/dapr/dotnet-sdk/blob/master/examples/Workflow/WorkflowConsoleApp/Workflows/OrderProcessingWorkflow.cs#L51

[mikeee]

do you know if its possible to add support for setting custom statuses? like here https://github.com/dapr/dotnet-sdk/blob/master/examples/Workflow/WorkflowConsoleApp/Workflows/OrderProcessingWorkflow.cs#L51

Not sure about the setting of custom statuses, I don't believe so at this stage - but I'll have a look into it.

[yaron2]

Looks like we can merge this. @cgillum

[mikeee]

@yaron2 for your eyes

[yaron2]

@mikeee please resolve the conflicts and we can merge

[mikeee]

I had a feeling this would happen 😂

[mikeee]

@yaron2 good to go, not sure why codecov is unhappy but 🤷