docs(key-concepts/presets): rewrite

[HonkingGoose]

Changes

• Rewrite the key concepts page for the presets
• Write short sentences
• Use simple terms and phrases, where possible
• Use lists
• Add admonition to emphasize that the order of operations is important for presets in the "extends" array

Context

A general rewrite, plus I'm trying to resolve a old discussion. 😄

Add user suggested bit to docs, or not?

A user suggested we add this explanation to the docs:

if folks want to group by mono repo first, and then major/minor: they should import group:allNonMajor first, and then config:recommended. This gives the desired result.

I changed the quote a bit, to match current terms, and to make it more readable. But the idea is the same. 😉 Source:

• Group by mono-repo first then minor-patch #21099 (comment)

I'm not sure if, or where, I should put this in the preset docs. It feels very in-depth, so if it goes in, it should go under a new sub-heading, somewhere suitable.

Documentation (please check one with an [x])

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• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository