Setup system for handeling transactions between acounts.

Made so each Transaction handler in the Account class to return the transaction object.
Updated the Utils class to handle the transactions que reading and writing.
Added org.json to aid in trnsaction que handling.
made so accounts can update there balance and transactions from the transaction que.
Added a tranfer window to handle the transfer of money between acounts.

build.gradle

@@ -13,6 +13,7 @@ repositories {
 dependencies {
     implementation 'com.google.code.gson:gson:2.12.1'
     implementation("org.jetbrains:annotations:23.1.0")
+    implementation 'org.json:json:20250107'
 }
 
 test {