Improve workflow examples

[kaibocai]

Description

This PR

1. improve workflow examples by adding a few widely used patterns

• Chaining Pattern

• Fan-out/Fan-in Pattern

• Continue As New Pattern

• External Event Pattern

• Sub-workflow Pattern

2. update the grpc dependency version so it works with the latest durabletask-java client v1.5.0

This PR is based on #947, and should be merged after it.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #944, #911

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[kaibocai]

I cannot add reviewers due to permission issues on this repo.

Tagging @johnewart , @cgillum, @artursouza , @cicoyle for review.

[cgillum]

Overall looks good to me! Just a few small things I noticed.

[mukundansundar]

Thanks for the contribution.
A few comments to add auto validation mechanical-markdown script to README and removal of gRPC update and have it as a separate one if possible.

[cicoyle]

This is great - thanks for enhancing the workflow example 🎉 It looks like you may need to tweak the port, since the build is failing due to the port not being available, but looks good 👍🏻

[kaibocai]

Hi @artursouza , @cicoyle and @mukundansundar . I need some help on the Auto Validate Examples, I could not figure out the right configuration. However, everything works as expected on my local. Thanks.

[artursouza]

Automation with MM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3b0747c) 76.54% compared to head (a488e5f) 76.54%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #949   +/-   ##
=========================================
  Coverage     76.54%   76.54%           
  Complexity     1467     1467           
=========================================
  Files           137      137           
  Lines          4472     4472           
  Branches        527      527           
=========================================
  Hits           3423     3423           
  Misses          763      763           
  Partials        286      286           

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[mukundansundar]

lgtm