docs: fix typedoc links and add missing packages

[etrepum]

• Added lexical-typedoc-module-name plugin to determine the module name from the path
  • Removed @module from all index.ts files
  • Enabled header/header eslint rule everywhere
  • Fixed header/header lint mistakes from modules that formerly contained @module
• Added lexical-remark-slugify-anchors plugin to fix typedoc-generated links to symbols that start with $ so that they work in docusaurus, and also fixes up the text so the links don't include the package scope, e.g. lexical/html!$generateHtmlFromNodes now displays as $generateHtmlFromNodes and should also link to the correct place
• Added @lexical/react and @lexical-yjs package docs to the sidebar
• Added entrypoints for @lexical/plain-text, @lexical/rich-text, @lexical/react to the typedoc config
• Configures typedoc to generate github links to the main tree (it works by default locally, but wherever this is building doesn't have a proper git checkout with remote, so this will override it)
• Removes unnecessary sidebar_position, cache_reset frontmatter from package docs
• Fixed @link typo in LexicalNode typedoc comment
• Fixed URL typo in @lexical/devtools-core package docs

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Name	Status	Preview	Comments	Updated (UTC)
lexical	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 9, 2024 3:30am
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[StyleT]

LGTM!

[StyleT]

I will give others opportunity to review and merge