feat(wallet): add recipient address to payment card UI

Enhanced the payment timeline card to display the recipient/sender address:
- Added truncatedToAddress and truncatedFromAddress to TimelineItemPaymentContent
- New truncateAddress() helper (first 8 + last 6 chars)
- Payment card now shows "To: addr_tes...ytjqp" for sent payments
- And "From: addr_tes...pd0hq" for received payments
- Updated wrapper to expose new properties

The card now displays:
- Amount in ADA (large, bold)
- Sent/Received indicator with Cardano icon
- Truncated recipient/sender address
- Status chip (Pending/Confirmed/Failed with icons)
- Truncated tx hash (tappable to CardanoScan)
- Testnet badge when applicable
- "View on CardanoScan →" link for confirmed transactions

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/model/event/TimelineItemPaymentContentWrapper.kt

@@ -35,5 +35,7 @@ data class TimelineItemPaymentContentWrapper(
     val amountAda: String get() = paymentContent.amountAda
     val isTestnet: Boolean get() = paymentContent.isTestnet
     val truncatedTxHash: String? get() = paymentContent.truncatedTxHash
+    val truncatedToAddress: String get() = paymentContent.truncatedToAddress
+    val truncatedFromAddress: String get() = paymentContent.truncatedFromAddress
     val explorerUrl: String? get() = paymentContent.explorerUrl
 }