Updating README

[jhughes-mw]

Wording and link cleanup in the README: point doc links at doc/, link the issues list, and fix a typo in the Community Support section.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.23%. Comparing base (80a802d) to head (a550292).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #136   +/-   ##
=======================================
  Coverage   99.23%   99.23%           
=======================================
  Files           8        8           
  Lines         263      263           
=======================================
  Hits          261      261           
  Misses          2        2           

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