PR Title:
feat: implement Soroban wallet auto-reconnect system (#354)
PR Description:
## Description
Closes #354.
<!-- ## Stellar/Soroban Features - All Issues Implemented -->
This PR implements a robust auto-reconnect system for Stellar/Soroban wallets (such as Freighter) within the `@bridgewise/wallet` package. It preserves disconnected wallet sessions persistently in browser storage and automatically restores them transparently during application initialization, preventing workflow interruptions in bridge operations.
## Changes Made
- Created `StellarReconnectManager` to serialize, store, and clear active Stellar wallet sessions (adapter type, address, chain ID) in `localStorage` under `bridgewise-stellar-session`.
- Implemented a 7-day expiration guard to ignore and clean up outdated session states.
- Extended `WalletManager` with connection persistence hooks in `connect()` and `disconnect()`.
- Exposed `autoReconnectStellar()` as a public method and integrated an initialization trigger in the `WalletManager` constructor when `autoReconnect` option is enabled.
- Added comprehensive unit and integration regression tests in `StellarReconnect.test.ts` verifying connection persistence, auto-reconnection, expiration pruning, and graceful missing-extension recovery.
## Acceptance Criteria Met
- [x] Persist session state of Stellar/Soroban wallets.
- [x] Reconnect wallets automatically on initialization.
- [x] Regression and unit tests verify protection and connection restoration logic.