CW-829 Solana Enhancements (#1858)

* feat: Solana enhancements with rent handling for accounts

* fix: Add exception classes with handled error messages to ensure proper error handling process

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

cw_solana/lib/solana_exceptions.dart

@@ -19,3 +19,20 @@ class SolanaTransactionWrongBalanceException implements Exception {
   @override
   String toString() => exceptionMessage;
 }
+
+class SolanaSignNativeTokenTransactionRentException implements Exception {}
+
+class SolanaCreateAssociatedTokenAccountException implements Exception {
+  final String exceptionMessage;
+
+  SolanaCreateAssociatedTokenAccountException(this.exceptionMessage);
+}
+
+class SolanaSignSPLTokenTransactionRentException implements Exception {}
+
+class SolanaNoAssociatedTokenAccountException implements Exception {
+  const SolanaNoAssociatedTokenAccountException(this.account, this.mint);
+
+  final String account;
+  final String mint;
+}