common: Add an UnknownException for unmanaged exceptions

Common/src/commonMain/kotlin/com/infomaniak/multiplatform_swisstransfer/common/exceptions/UnknownException.kt

@@ -0,0 +1,36 @@
+/*
+ * Infomaniak SwissTransfer - Multiplatform
+ * Copyright (C) 2024 Infomaniak Network SA
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.infomaniak.multiplatform_swisstransfer.common.exceptions
+
+/**
+ * Represents an unknown exception that can occur during the execution of the application.
+ *
+ * This exception is used to encapsulate unexpected or unknown errors that are not covered
+ * by other specific exception types.
+ *
+ * @property message The detailed message describing the error.
+ * @property cause The underlying cause of this exception, if any.
+ *
+ * @constructor Creates an instance of `UnknownException` with a detailed error message and an optional cause.
+ *
+ * @param cause The underlying exception that caused this exception.
+ */
+class UnknownException(cause: Throwable) : Exception(cause) {
+    override val message: String = cause.message ?: cause.toString()
+}