Don't use shutdown() in shutdownNow()

Calling scheduleShutdownSignal more than once is not great

Author: freya022

src/main/kotlin/io/github/freya022/botcommands/internal/core/BContextImpl.kt

@@ -179,7 +179,11 @@ internal class BContextImpl internal constructor(
     }
 
     override fun shutdownNow() {
-        shutdown()
+        // Do not call shutdown(), more precisely do not call scheduleShutdownSignal() twice
+        if (status == Status.SHUTTING_DOWN || status == Status.SHUTDOWN) return
+        removeShutdownHook()
+
+        runBlocking { setStatus(Status.SHUTTING_DOWN) }
 
         scheduleShutdownSignal(afterShutdownSignal = {
             shutdownEventManagerScope(now = true)