feat(canton): added new merge utxo feature flag

Ticket: CHALO-375

Author: borkds

modules/statics/src/allCoinsAndTokens.ts

@@ -3422,7 +3422,7 @@ export const allCoinsAndTokens = [
     'Testnet Canton Coin',
     Networks.test.canton,
     UnderlyingAsset.CANTON,
-    [...CANTON_FEATURES, CoinFeature.UNSPENT_MODEL],
+    [...CANTON_FEATURES, CoinFeature.UNSPENT_MODEL, CoinFeature.MERGE_UTXOS],
     KeyCurve.Ed25519
   ),
   gasTankAccount(

modules/statics/src/base.ts

@@ -202,6 +202,10 @@ export enum CoinFeature {
    * These are typically Bitcoin and forks of it, such as Litecoin and Bitcoin Cash.
    */
   UNSPENT_MODEL = 'unspent-model',
+  /*
+   * This coin supports merging multiple UTXO-like holdings into fewer outputs.
+   */
+  MERGE_UTXOS = 'merge-utxos',
   /*
    * Does this coin align with the Lightning Network model?
    *