docs: add cli config reference

[lornajane]

What/Why/How?

We have some config options that are in use in the CLI, but the rest of the config docs are still private for the new products. Create matching-format pages for the options that belong here so we can link to them.

Check yourself

• Code changed? - Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests
• New package installed? - Tested in different environments (browser/node)

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3448a6c

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[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.004 ± 0.017	0.978	1.041	1.01 ± 0.03
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	0.996 ± 0.023	0.967	1.047	1.00

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	76.65%	4395/5734
🟡	Branches	66.72%	2360/3537
🟡	Functions	70.1%	722/1030
🟡	Lines	76.82%	4126/5371

Test suite run success

716 tests passing in 101 suites.

Report generated by 🧪jest coverage report action from 3448a6c

[HCloward]

Is there a default?

[lornajane]

I'm not sure, I didn't know this existed until I tried to write the doc and found it!

[HCloward]

Everything looks good to me. I checked all links in sample preview and all work as expected.