feat: fix .d.ts whitespaces tool

tools/fix-dts.mts

@@ -0,0 +1,33 @@
+import { readdir, readFile, writeFile, lstat } from "node:fs/promises";
+import { join, resolve } from "node:path";
+
+/** Adds two spaces to the end of each line in JSDoc comments to preserve the meticulous line breaks */
+async function addTrailingSpaces(filePath: string) {
+  const content = String(await readFile(filePath, "utf8"));
+
+  const fixedContent = content.replace(/\/\*\*[\s\S]*?\*\//g, (m) =>
+    m.replace(/\n/g, (m, i) =>
+      i > 3 ? `  ${m}` : m
+    )
+  );
+
+  await writeFile(filePath, fixedContent, "utf8");
+}
+
+/** Recursively processes all files in the given directory */
+async function processRecursive(directory: string) {
+  directory = resolve(directory);
+  const files = await readdir(directory);
+
+  for(const file of files) {
+    const fullPath = join(directory, file);
+    const stats = await lstat(fullPath);
+
+    if(stats.isDirectory())
+      await processRecursive(fullPath);
+    else if(fullPath.endsWith(".d.ts"))
+      await addTrailingSpaces(fullPath);
+  }
+}
+
+processRecursive("./dist/lib");