other: update a bunch of argument descriptions and some arg/config names

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

Goes through and updates a few arg/config names to make more sense, and give the docs/arg descriptions a pass.

Something to do in a future PR is to figure out how we're doing json schema rollouts...

Issue

If applicable, what issue does this address?

Closes: #

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

Attention: Patch coverage is 98.72881% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 55.82%. Comparing base (d341dbb) to head (18f20a7).
Report is 2 commits behind head on main.

❗ Current head 18f20a7 differs from pull request most recent head 6be7fb7. Consider uploading reports for the commit 6be7fb7 to get more accurate results

Files	Patch %	Lines
src/app.rs	0.00%	2 Missing ⚠️
src/canvas/widgets/cpu_graph.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1441      +/-   ##
==========================================
- Coverage   55.92%   55.82%   -0.10%     
==========================================
  Files          97       97              
  Lines       18271    18230      -41     
==========================================
- Hits        10218    10177      -41     
  Misses       8053     8053              

Flag	Coverage Δ
macos-12	39.13% <97.45%> (-0.16%)	⬇️
ubuntu-latest	58.42% <98.72%> (-0.10%)	⬇️
windows-2019	39.32% <97.45%> (-0.16%)	⬇️

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