fix: include dist directories to package

`dist-*` doesn't work with `npm pack` (at least with 9.5.1) and nothing is packed.

This commit fixes `files` to specify individual dist directories explicitly
so that `npm pack` can include all files.

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/base-package.json

@@ -35,5 +35,9 @@
       "dist-types/*": ["dist-types/ts3.4/*"]
     }
   },
-  "files": ["dist-*"]
+  "files": [
+    "dist-cjs",
+    "dist-types",
+    "dist-es"
+  ]
 }