cli: add automatic exports compatibility entry point addition to files field

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/cli/src/lib/monorepo/PackageGraph.ts

@@ -42,6 +42,8 @@ export interface ExtendedPackageJSON extends PackageJSON {
 
   exports?: JsonValue;
   typesVersions?: Record<string, Record<string, string[]>>;
+
+  files?: string[];
 }
 
 export type ExtendedPackage = {

packages/cli/src/lib/packager/productionPack.ts

@@ -212,6 +212,9 @@ async function writeExportsEntryPoints(
         },
         { encoding: 'utf8', spaces: 2 },
       );
+      if (Array.isArray(pkg.files) && !pkg.files.includes(entryPoint.name)) {
+        pkg.files.push(entryPoint.name);
+      }
     }
 
     if (Object.keys(exp).length > 0) {