SNOW-825595: Update setup instruction for non-Windows environment

[sfc-gh-ext-simba-lf]

Description

Update README.md with instructions for building on Non-Windows

Checklist

• Code compiles correctly
• Code is formatted according to Coding Conventions
• Created tests which fail without the change (if possible)
• All tests passing (dotnet test)
• Extended the README / documentation, if necessary
• Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.25%. Comparing base (4d85588) to head (28b6d37).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #885   +/-   ##
=======================================
  Coverage   84.25%   84.25%           
=======================================
  Files          88       88           
  Lines        9400     9400           
  Branches      886      886           
=======================================
  Hits         7920     7920           
  Misses       1248     1248           
  Partials      232      232           

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