Well known headers in typescript file (#3014)

Need this for #3011 
For some weird reason it's no longer working with latest rolldown.

Todo: align the generator tool

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Migrated headers data storage from JSON to TypeScript module format
for improved maintainability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: RobinTail

express-zod-api/src/documentation-helpers.ts

@@ -45,7 +45,7 @@ import { ezRawBrand } from "./raw-schema.ts";
 import { FirstPartyKind } from "./schema-walker.ts";
 import { Security } from "./security.ts";
 import { ezUploadBrand } from "./upload-schema.ts";
-import wellKnownHeaders from "./well-known-headers.json" with { type: "json" };
+import wellKnownHeaders from "./well-known-headers.ts";
 
 interface ReqResCommons {
   makeRef: (

express-zod-api/src/well-known-headers.json renamed to express-zod-api/src/well-known-headers.ts

@@ -1,4 +1,4 @@
-[
+export default [
   "a-im",
   "accept",
   "accept-additions",
@@ -201,5 +201,5 @@
   "want-repr-digest",
   "warning",
   "x-content-type-options",
-  "x-frame-options"
-]
+  "x-frame-options",
+];

tools/headers.ts

@@ -1,5 +1,6 @@
 import { execSync } from "node:child_process";
 import { writeFile } from "node:fs/promises";
+import { format } from "prettier";
 
 /**
  * @link https://chatgpt.com/c/6795dae3-8a10-800e-96af-fd0d01579f39
@@ -208,7 +209,7 @@ const responseOnlyHeaders = {
   },
 };
 
-const dest = "express-zod-api/src/well-known-headers.json";
+const dest = "express-zod-api/src/well-known-headers.ts";
 
 let mtime: Date | undefined;
 try {
@@ -252,4 +253,6 @@ const headers = lines
 
 console.debug("CRC:", headers.length);
 
-await writeFile(dest, JSON.stringify(headers, undefined, 2), "utf-8");
+const json = JSON.stringify(headers, undefined, 2);
+const tsCode = await format(`export default ${json};`, { filepath: dest });
+await writeFile(dest, tsCode, "utf-8");