Fixing slow typing in Sanity Studio by setting up NextJS and Sanity correctly

"sanity": "^3.43.0",
"next-sanity": "^9.3.7",

`export const articleContent = defineType({
  title: "Article Content",
  name: "articleContent",
  type: "array",
  of: [
    defineArrayMember({
      title: "Block",
      type: "block",
      // Styles let you define what blocks can be marked up as. The default
      // set corresponds with HTML tags, but you can set any title or value
      // you want, and decide how you want to deal with it where you want to
      // use your content.
      styles: [
        { title: "Normal", value: "normal" },
        { title: "H1", value: "h1" },
        { title: "H2", value: "h2" },
        { title: "H3", value: "h3" },
        { title: "H4", value: "h4" },
        { title: "Quote", value: "blockquote" },
      ],
      lists: [{ title: "Bullet", value: "bullet" }],
      // Marks let you mark up inline text in the Portable Text Editor
      marks: {
        // Decorators usually describe a single property – e.g. a typographic
        // preference or highlighting
        decorators: [
          { title: "Strong", value: "strong" },
          { title: "Emphasis", value: "em" },
        ],
        // Annotations can be any object structure – e.g. a link or a footnote.
        annotations: [
          {
            title: "URL",
            name: "link",
            type: "object",
            fields: [
              {
                title: "URL",
                name: "href",
                type: "url",
              },
            ],
          },
        ],
      },
    }),
    // You can add additional types here. Note that you can't use
    // primitive types such as 'string' and 'number' in the same array
    // as a block type.
    defineArrayMember({
      type: "imageWithCaption",
    }),
    defineArrayMember({
      type: "testimonial",
    }),
    defineArrayMember({
      type: "customerCase",
    }),
  ],
});