docs: add anchor link to reference parameters (#6194)

- Added anchor links to items in parameter components
- Added sectionTitle prop in markdown theme

Note: Due to the second point, the change requires generating references to see the anchor links, which would result in a big diff in this PR. Instead, next time the references are generated for a release, this feature will available for use.

www/apps/docs/src/utils/is-in-view.ts

@@ -0,0 +1,10 @@
+export default function isInView(element: Element): boolean {
+  const rect = element.getBoundingClientRect()
+  return (
+    rect.top >= 0 &&
+    rect.left >= 0 &&
+    rect.bottom <=
+      (window.innerHeight || document.documentElement.clientHeight) &&
+    rect.right <= (window.innerWidth || document.documentElement.clientWidth)
+  )
+}