Combine all sources into a sub-directory

sources/src/errors.ts

@@ -0,0 +1,11 @@
+export class PostActionJobFailure extends Error {
+    constructor(error: unknown) {
+        if (error instanceof Error) {
+            super(error.message)
+            this.name = error.name
+            this.stack = error.stack
+        } else {
+            super(String(error))
+        }
+    }
+}