Clarify link, table syntax guidelines

[austin-schaefer]

• Clarifies that we only use inline links (and why)
• Clarifies we don't use markdown tables (and why)
• Combine Formatting and Structure categories together
• Corrects various outdated and inaccurate info about tables
• Various minor wording and clarity fixes to various component docs

[github-actions]

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[paperclypse]

Thanks for doing this!

[paperclypse]

better cat name