[Docs] Apply chaos selectively

[martintmk]

Details on the issue fix or feature implementation

Add section about how to apply chaos selectively.

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• 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 and coverable lines are covered by tests ✅

Comparison is base (1dcfc01) 84.79% compared to head (ce3c3e5) 84.79%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1923   +/-   ##
=======================================
  Coverage   84.79%   84.79%           
=======================================
  Files         312      312           
  Lines        6893     6893           
  Branches     1056     1056           
=======================================
  Hits         5845     5845           
  Misses        839      839           
  Partials      209      209           

Flag	Coverage Δ
linux	84.79% <ø> (?)
macos	84.79% <ø> (ø)
windows	?

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[peter-csala]

@martintmk Would it make sense to turn the IChaosManager to asynchronous?

public interface IChaosManager
{
    ValueTask<bool> IsChaosEnabled(ResilienceContext context);

    ValueTask<double> GetInjectionRate(ResilienceContext context);
}

[martintmk]

@martintmk Would it make sense to turn the IChaosManager to asynchronous?

public interface IChaosManager
{
    ValueTask<bool> IsChaosEnabled(ResilienceContext context);

    ValueTask<double> GetInjectionRate(ResilienceContext context);
}

I did not use it because in the code samples there was no async at all. But it can make the second sample little cleaner. Let me try it.