Switch to node action

This is done to be able to pass loaded secrets as output. This is not available with a composite action, unless we hard-code the action's outputs, which is not a desired outcome.

tsconfig.json

@@ -0,0 +1,13 @@
+{
+    "compilerOptions": {
+        "target": "es6",
+        "module": "commonjs",
+        "moduleResolution": "node",
+        "outDir": "./dist",
+        "rootDir": "./src",
+        "strict": true,
+        "noImplicitAny": true,
+        "esModuleInterop": true
+    },
+    "exclude": ["node_modules"]
+}