feat(sdk-coin-evm): enable message signing for base

Ticket: SC-3598

Author: derekchen745

modules/sdk-coin-evm/src/evmCoin.ts

@@ -43,6 +43,16 @@ export class EvmCoin extends AbstractEthLikeNewCoins {
     return 'ecdsa';
   }
 
+  /** @inheritDoc */
+  supportsMessageSigning(): boolean {
+    return true;
+  }
+
+  /** @inheritDoc */
+  supportsSigningTypedData(): boolean {
+    return true;
+  }
+
   protected async buildUnsignedSweepTxnTSS(params: RecoverOptions): Promise<OfflineVaultTxInfo | UnsignedSweepTxMPCv2> {
     if (this.staticsCoin?.features.includes(CoinFeature.MPCV2)) {
       return this.buildUnsignedSweepTxnMPCv2(params);