docs: Tidy install and authentication instructions
Description
Revises the installation instructions (most of them, anyway) and the authentication instructions. I switched lots of one-line commands from code blocks to inline code to help condense the page. I got in the weeds further down in the various Linux distros and opted to stop, rather than make guesses.
Related Issues
Related to TW review of README (#1013 - closed)
How has this been tested?
Screenshots (if appropriate):
Types of changes
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Bug fix (non-breaking change which fixes an issue) -
New feature (non-breaking change which adds functionality) -
Breaking change (fix or feature that would cause existing functionality to change) -
Documentation -
Chore (Related to CI or Packaging to platforms)
Closes #1013 (closed)