[Portal] Fix reference page static generation (#5484)

NOTE:

This will not build - Recently the sidebar categories have been updated in the reference pages and this is creating issues with static build. Need to fix those errors

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## PR-Codex overview
This PR focuses on making adjustments to various files, including changing limits on data retrieval, modifying the structure of TypeScript types, and cleaning up the formatting of documentation.

### Detailed summary
- Changed `-limit` from `50` to `20` in `apps/portal/src/app/changelog/ghost.ts`.
- Removed `classes`, `variables`, `types`, and `enums` from `subgroups` in `apps/portal/src/app/references/components/TDoc/utils/subgroups.ts`.
- Cleaned up documentation text in `apps/portal/src/app/typescript/v5/chain/page.mdx`.
- Reformatted `PageProps` type definition in `apps/portal/src/app/references/components/TDoc/PageLayout.tsx` for better readability.
- Updated return type of `generateStaticParams` function to be more explicit in `apps/portal/src/app/references/components/TDoc/PageLayout.tsx`.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

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Author: MananTank

apps/portal/src/app/changelog/ghost.ts

@@ -8,7 +8,7 @@ export async function fetchChangeLogs() {
     key: GHOST_THIRDWEB_BLOG_KEY,
     fields: ["title", "slug", "published_at"].join(","),
     filter: "tag:changelog",
-    limit: "50",
+    limit: "20",
     order: "published_at DESC",
     include: ["authors", "tags"].join(","),
   })

apps/portal/src/app/references/components/TDoc/PageLayout.tsx

@@ -20,7 +20,10 @@ import { getSidebarLinkGroups } from "./utils/getSidebarLinkgroups";
 import { fetchAllSlugs, getSlugToDocMap } from "./utils/slugs";
 import { nameToSubgroupSlug, subgroups } from "./utils/subgroups";
 
-type PageProps = { params: Promise<{ version: string; slug?: string[] }> };
+type PageProps = {
+  params: Promise<{ version: string; slug?: string[] }>;
+};
+
 type LayoutProps = {
   params: Promise<{ version: string }>;
   children: React.ReactNode;
@@ -100,7 +103,9 @@ export function getTDocPage(options: {
   }
 
   // statically generate pages for latest version
-  async function generateStaticParams(): Promise<PageProps["params"][]> {
+  async function generateStaticParams(): Promise<
+    Awaited<PageProps["params"]>[]
+  > {
     const versions = await getVersions();
 
     const returnVal = await Promise.all(
@@ -125,8 +130,7 @@ export function getTDocPage(options: {
         }),
     );
 
-    const paths = returnVal.flat();
-    return paths.map((p) => Promise.resolve(p));
+    return returnVal.flat();
   }
 
   async function generateMetadata(props: PageProps): Promise<Metadata> {

apps/portal/src/app/references/components/TDoc/utils/subgroups.ts

@@ -1,11 +1,7 @@
 export const subgroups = {
   components: "UI Components",
   hooks: "React Hooks",
-  classes: "Classes",
   functions: "Core Functions",
-  variables: "Variables",
-  types: "Types",
-  enums: "Enums",
 };
 
 export const nameToSubgroupSlug = (() => {

apps/portal/src/app/typescript/v5/chain/page.mdx

@@ -10,7 +10,7 @@ import { defineChain } from "thirdweb";
 const myChain = defineChain(myChainId);
 ```
 
-The SDK comes with predefined [popular chains](/references/typescript/v5/variables) like `base`, `polygon`, and more exported from the `thirdweb/chains` entrypoint.
+The SDK comes with predefined popular chains like `base`, `polygon`, and more exported from the `thirdweb/chains` entrypoint.
 
 ```ts
 import { polygon } from "thirdweb/chains";