[Docs] Use docfx to dynamically render mermaid diagrams

[peter-csala]

Pull Request

The issue or feature being addressed

• [Docs] Add sequence diagrams to timeout strategy #1699

Details on the issue fix or feature implementation

• Deleted previously added png files
• Added dark theme to the diagrams to make them legible in Dark and Light mode

Proof

Note: The built-in themes are either optimized for white or black background. Only the dark is legible in both cases

Dark theme

Light theme

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (b169f88) 84.63% compared to head (2f5638a) 84.63%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1701   +/-   ##
=======================================
  Coverage   84.63%   84.63%           
=======================================
  Files         306      306           
  Lines        6819     6819           
  Branches     1045     1045           
=======================================
  Hits         5771     5771           
  Misses        839      839           
  Partials      209      209           

Flag	Coverage Δ
linux	?
macos	84.63% <ø> (ø)
windows	84.63% <ø> (ø)

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see 5 files with indirect coverage changes

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[peter-csala]

After scrutinizing the relevant documentation it turned out mermaid is supported by the modern template. I checked it locally and it works. I'm repurposing this PR to enable mermaid diagrams.

[martincostello]

I don't use the dark theme, and these diagrams don't look good: