fix: add default + require exports to @relaycast/sdk (#90)

* fix: add default + require exports to @relaycast/sdk

tsx (and other CJS-in-ESM resolvers) fails with ERR_PACKAGE_PATH_NOT_EXPORTED
when only 'import' is specified in exports map. Adding 'default' and 'require'
entries fixes interop with tsx, ts-node, and mixed CJS/ESM consumers.

* address feedback

Author: khaliqgant

packages/sdk-typescript/package.json

@@ -7,11 +7,13 @@
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
-      "import": "./dist/index.js"
+      "import": "./dist/index.js",
+      "default": "./dist/index.js"
     },
     "./internal": {
       "types": "./dist/internal.d.ts",
-      "import": "./dist/internal.js"
+      "import": "./dist/internal.js",
+      "default": "./dist/internal.js"
     }
   },
   "scripts": {