docs-util: Upgrade typedoc to 0.26 (#7853)

Upgrade typedoc to v0.26 + make changes based on the update

Note: This update produces an error when generating model references when the models use the `createPsqlIndexStatementHelper` decorator. As this isn't a breaking error, and as we'll move to DML in the future, it's not necessary to spend time on a fix.

www/utils/packages/scripts/run-changeset.ts

@@ -18,7 +18,7 @@ async function main() {
 
   // run changeset
   await promiseExec(`yarn changeset --empty`, {
-    cwd: path.resolve("..", "..", ".."),
+    cwd: path.resolve("..", "..", "..", ".."),
   })
   console.log("Generated changeset.")
 }