Add support for submitting the transactions to Actual server

src/util/config.ts

@@ -0,0 +1,17 @@
+import { readFileSync } from "fs";
+
+const specialOptions: Record<string, (text: string) => string> = {
+  $__file: (arg: string) => readFileSync(arg, 'utf8').trim()
+};
+
+export const enhancedStringConfig = (value: string) => {  
+  const trimmed = value.trim();
+
+  for(const opt of Object.keys(specialOptions)) {
+    if(trimmed.startsWith(`${opt}:`) && opt in specialOptions) {      
+      return specialOptions[opt](trimmed.slice(opt.length + 1).trim());
+    }
+  }
+
+  return trimmed;
+};