refactor: rename flags.enable_gpu to flags.disable_gpu (false by default)

[shurizzle]

Description

Rename flags.enable_gpu to flags.disable_gpu and make it false by default

Closes: #1554

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 41.46%. Comparing base (1f011bd) to head (241c518).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/options/args.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1559      +/-   ##
==========================================
+ Coverage   41.39%   41.46%   +0.07%     
==========================================
  Files         114      114              
  Lines       17839    17837       -2     
==========================================
+ Hits         7385     7397      +12     
+ Misses      10454    10440      -14     

Flag	Coverage Δ
macos-12	36.72% <88.88%> (+0.01%)	⬆️
ubuntu-latest	43.44% <88.88%> (+0.07%)	⬆️
windows-2019	36.92% <88.88%> (+0.01%)	⬆️

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[ClementTsang]

One small change, otherwise looks fine.

Note I'll probably change it in the future to have more fine-grained control over what parts to include GPU info, but this is fine for now.

[shurizzle]

I wanted to fix the documentation as well, but I would have asked you a ton of questions, so it might be faster if you fix it yourself. If there's anything wrong, just let me know.

[ClementTsang]

Seems good to me. Thanks!

[ClementTsang]

@all-contributors please add @shurizzle for code.

[allcontributors]

@ClementTsang

@shurizzle already contributed before to code