Switch tsconfig module resolution to bundler (#682)

Changes module from "commonjs" to "es2022" and moduleResolution
from "node" to "bundler". This tells TypeScript to resolve imports
the way esbuild does, including support for package.json "exports"
maps used by newer @actions/* and @octokit/* packages.

Since esbuild handles the actual CJS output (--format=cjs), these
settings only affect type-checking — the runtime behavior is unchanged.

Co-authored-by: Thomas Ruggeri <truggeri@github.com>

Author: jeffwidman

tsconfig.json

@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
     "target": "es2024",
-    "module": "commonjs",
-    "moduleResolution": "node",
+    "module": "es2022",
+    "moduleResolution": "bundler",
     "rootDir": "./src",
     "strict": true,
     "noImplicitAny": false,