add KeyProviderException

src/main/kotlin/ltd/hlaeja/exception/KeyProviderException.kt

@@ -0,0 +1,23 @@
+package ltd.hlaeja.exception
+
+@Suppress("unused")
+class KeyProviderException : RuntimeException {
+
+    constructor() : super()
+
+    constructor(message: String) : super(message)
+
+    constructor(cause: Throwable) : super(cause)
+
+    constructor(
+        message: String,
+        cause: Throwable,
+    ) : super(message, cause)
+
+    constructor(
+        message: String,
+        cause: Throwable,
+        enableSuppression: Boolean,
+        writableStackTrace: Boolean,
+    ) : super(message, cause, enableSuppression, writableStackTrace)
+}