docs: migrate jsdoc

[bennypowers]

What I did

1. migrate jsdoc @csspart and @slot to html comments

Notes to Reviewers

what we're looking to see here is that the manifest is basically the same as or better than main

for after #2455

one improvement we already got: deprecated flag for cssprops:

# Deprecations
<root>
├─┬module rh-navigation-secondary/rh-navigation-secondary-overlay.js
│ └─┬<rh-navigation-secondary-overlay>
│   └─┬CSS Properties
│     └──--rh-secondary-nav-overlay-z-index (DEPRECATED: use --rh-navigation-secondary-overlay-z-index) 
└─┬module rh-tooltip/rh-tooltip.js
  └─┬<rh-tooltip>
    └─┬CSS Properties
      ├──--rh-tooltip__arrow--Width (DEPRECATED: use --rh-tooltip-arrow-size) 
      ├──--rh-tooltip--MaxWidth (DEPRECATED: use --rh-tooltip-max-width) 
      ├──--rh-tooltip__content--PaddingTop (DEPRECATED: use --rh-tooltip-content-padding-block-start) 
      ├──--rh-tooltip__content--PaddingBottom (DEPRECATED: use --rh-tooltip-content-padding-block-end) 
      ├──--rh-tooltip__content--PaddingLeft (DEPRECATED: use --rh-tooltip-content-padding-inline-start) 
      ├──--rh-tooltip__content--PaddingRight (DEPRECATED: use --rh-tooltip-content-padding-inline-end) 
      ├──--rh-tooltip__content--FontSize (DEPRECATED: use --rh-tooltip-content-font-size) 
      ├──--rh-tooltip__content--Color (DEPRECATED: use --rh-tooltip-content-color) 
      └──--rh-tooltip__content--BackgroundColor (DEPRECATED: use --rh-tooltip-content-background-color) 

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[zeroedin]

Labelled Guides Teach Meaning

[adamjohnson]

Found a few more edge cases. 😇

[adamjohnson]

Line-by-line Guidance, Thoughtfully Moved