Update JS dependencies (#28537)

- Update all JS dependencies excluding mcaptcha (breaking changes) and
stylelint (plugin not compatible with v16)
- Regenerate SVGs
- Update markdownlint rule names
- Fix one issue of heading in markdown discovered during lint
- Update for monaco options renames
- Fix stylelint rule length-zero-no-unit for custom properties
- Tested editor, swagger, sorting, vue, lint

public/assets/img/svg/gitea-split.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" class="svg gitea-split" width="16" height="16" aria-hidden="true"><path d="M7.25 14.25a.75.75 0 0 0 1.5 0v-.5a.75.75 0 0 0-1.5 0zM8 12a.75.75 0 0 1-.75-.75v-.5a.75.75 0 0 1 1.5 0v.5A.75.75 0 0 1 8 12m-.75-3.75a.75.75 0 0 0 1.5 0v-.5a.75.75 0 0 0-1.5 0zM8 6a.75.75 0 0 1-.75-.75v-.5a.75.75 0 0 1 1.5 0v.5A.75.75 0 0 1 8 6m-.75-3.75a.75.75 0 0 0 1.5 0v-.5a.75.75 0 0 0-1.5 0zm4.1 6.5a.75.75 0 0 1 0-1.5h1.25V5.1a.25.25 0 0 1 .43-.17l2.9 2.9a.25.25 0 0 1 0 .35l-2.9 2.9a.25.25 0 0 1-.43-.18V8.75ZM3.4 10.9V8.75h1.25a.75.75 0 0 0 0-1.5H3.4V5.1a.25.25 0 0 0-.43-.17l-2.9 2.9a.25.25 0 0 0 0 .35l2.9 2.9a.25.25 0 0 0 .43-.18z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" class="svg gitea-split" width="16" height="16" aria-hidden="true"><path d="M7.25 14.25a.75.75 0 0 0 1.5 0v-.5a.75.75 0 0 0-1.5 0zM8 12a.75.75 0 0 1-.75-.75v-.5a.75.75 0 0 1 1.5 0v.5A.75.75 0 0 1 8 12m-.75-3.75a.75.75 0 0 0 1.5 0v-.5a.75.75 0 0 0-1.5 0zM8 6a.75.75 0 0 1-.75-.75v-.5a.75.75 0 0 1 1.5 0v.5A.75.75 0 0 1 8 6m-.75-3.75a.75.75 0 0 0 1.5 0v-.5a.75.75 0 0 0-1.5 0zm4.1 6.5a.75.75 0 0 1 0-1.5h1.25V5.1a.25.25 0 0 1 .43-.17l2.9 2.9a.25.25 0 0 1 0 .35l-2.9 2.9a.25.25 0 0 1-.43-.18V8.75ZM3.4 10.9V8.75h1.25a.75.75 0 0 0 0-1.5H3.4V5.1a.25.25 0 0 0-.43-.17l-2.9 2.9a.25.25 0 0 0 0 .35l2.9 2.9a.25.25 0 0 0 .43-.18"/></svg>