Consolidated CLI flag and Env Var sections

[travisamartin]

Proposed changes

This MR combines the CLI Flag and Env Var sections into one place so users can find all the information without scrolling back and forth.

Closes #861

Checklist

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• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

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