fix(types): preserve emitted ts-ignore comments

Author: apcha-oai

scripts/utils/postprocess-files.cjs

@@ -23,12 +23,16 @@ async function postprocess() {
 
     // strip out lib="dom", types="node", and types="react" references; these
     // are needed at build time, but would pollute the user's TS environment
-    const transformed = code.replace(
+    let transformed = code.replace(
       /^ *\/\/\/ *<reference +(lib="dom"|types="(node|react)").*?\n/gm,
       // replace with same number of characters to avoid breaking source maps
       (match) => ' '.repeat(match.length - 1) + '\n',
     );
 
+    if (/\.d\.[cm]?ts$/.test(file)) {
+      transformed = transformed.replace(/\/\*\* @ts-ignore ([^*]+?) \*\/ type /g, '// @ts-ignore $1\ntype ');
+    }
+
     if (transformed !== code) {
       console.error(`wrote ${path.relative(process.cwd(), file)}`);
       await fs.promises.writeFile(file, transformed, 'utf8');