[DOCS] Add HTTP client integration samples

[peter-csala]

Pull Request

The issue or feature being addressed

• [Question]: documentation #2530

Details on the issue fix or feature implementation

Done

• Preview
• Added sample for HttpClient
• Added sample for Refit
• Added sample for Flurl
• Added sample for Restsharp

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 and coverable lines are covered by tests ✅

Project coverage is 96.23%. Comparing base (e15a4a0) to head (5695a95).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2587   +/-   ##
=======================================
  Coverage   96.23%   96.23%           
=======================================
  Files         311      311           
  Lines        7327     7327           
  Branches     1013     1013           
=======================================
  Hits         7051     7051           
  Misses        222      222           
  Partials       54       54           

Flag	Coverage Δ
linux	96.23% <ø> (ø)
macos	96.23% <ø> (ø)
windows	96.22% <ø> (ø)

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[peter-csala]

@martincostello Could you please review it?

[martincostello]

Just needs vNext adding to .github/wordlist.txt.

[peter-csala]

Just needs vNext adding to .github/wordlist.txt.

Thank you for the review and the suggestions.