[xc-admin] error if proposals have more than 255 instructions (#618)

* Make the change

* Revert other files

* Remove console log

* Fix typo

* Add new keyword

Author: guibescos

governance/xc_admin/packages/xc_admin_common/src/propose.ts

@@ -64,6 +64,9 @@ export async function proposeInstructions(
     }
 
     const batches = batchIntoExecutorPayload(instructions);
+    if (255 <= batches.length) {
+      throw new Error("A proposal can only support 255 instructions");
+    }
     for (const [i, batch] of batches.entries()) {
       const squadIx = await wrapAsRemoteInstruction(
         squad,
@@ -86,6 +89,9 @@ export async function proposeInstructions(
       );
     }
   } else {
+    if (255 <= instructions.length) {
+      throw new Error("A proposal can only support 255 instructions");
+    }
     for (let i = 0; i < instructions.length; i++) {
       ixToSend.push(
         await squad.buildAddInstruction(