docs(datasource/custom): rewrite debugging section

[HonkingGoose]

Changes

• Write short sentences
• Use common words
• Use ordered list
• Add headings
• Use active voice and present tense
• Emphasize the key difference in one sentence
• Add a good title to the JSON codeblock
• Link to the docs for the configuration options
• Explain who the information is for with the If you ... then do ... style sentences

Context

Rewrite the text that @secustor added with:

• chore(datasource/custom): log data before jsonata processing #30241

Documentation (please check one with an [x])

• I have updated the documentation, or
• 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

[secustor]

Thanks for rewriting the docs. I have added the relative links and a fix for the linting issue.

[renovate-release]

🎉 This issue has been resolved in version 37.438.5 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.438.5

Your semantic-release bot 📦🚀