Add workflow sample fanout/fanin

[MregXN]

Description

Please reference the issue #1203

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.53%. Comparing base (10ef818) to head (c08017e). Report is 33 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1204 +/- ## ======================================= Coverage 66.53% 66.53% ======================================= Files 171 171 Lines 5752 5752 Branches 626 626 ======================================= Hits 3827 3827 Misses 1776 1776 Partials 149 149 ``` | [Flag](https://app.codecov.io/gh/dapr/dotnet-sdk/pull/1204/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dapr) | Coverage Δ | | |---|---|---| | [net6](https://app.codecov.io/gh/dapr/dotnet-sdk/pull/1204/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dapr) | `66.52% <ø> (ø)` | | | [net7](https://app.codecov.io/gh/dapr/dotnet-sdk/pull/1204/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dapr) | `66.52% <ø> (ø)` | | | [net8](https://app.codecov.io/gh/dapr/dotnet-sdk/pull/1204/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dapr) | `66.52% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dapr#carryforward-flags-in-the-pull-request-comment) to find out more.

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[WhitWaldo]

@MregXN First of all, thank you very much for your contributions!

I'd like to merge this and your other PRs, but it looks as though they're using the since-deprecated methods on the DaprClient instead of those from the separate Dapr.Workflow client.

Each client had the same general layout, so I created a matching review on each and suggested a few typo corrections to the README. If you're able to get these changes made, I don't see any other blockers to merging each of these into 1.15 barring a brief review following your updates.