refactor(sequencer): add test for mempool and bring back standalone feature

test_programs/src/lib.rs

@@ -11,6 +11,21 @@ mod guests {
     include!(concat!(env!("OUT_DIR"), "/methods.rs"));
 }
 
+#[must_use]
+#[inline]
+pub const fn simple_balance_transfer() -> Program {
+    use guests::{
+        SIMPLE_BALANCE_TRANSFER_ELF, SIMPLE_BALANCE_TRANSFER_ID, SIMPLE_BALANCE_TRANSFER_PATH,
+    };
+
+    let _unused = SIMPLE_BALANCE_TRANSFER_PATH;
+
+    Program::new_unchecked(
+        SIMPLE_BALANCE_TRANSFER_ID,
+        Cow::Borrowed(SIMPLE_BALANCE_TRANSFER_ELF),
+    )
+}
+
 #[must_use]
 #[inline]
 pub const fn chain_caller() -> Program {