fix(CommandProcessor): missing guild check and if command exists before execution

src/main/java/me/bobert/netneutrality/context/MessageCommandContext.java

@@ -66,6 +66,11 @@ public class MessageCommandContext extends CommandContext {
         return true;
     }
 
+    @Override
+    public boolean isFromGuild() {
+        return event.isFromGuild();
+    }
+
     @Override
     public InteractionHook getInteractionHook() {
         return null;

src/main/java/me/bobert/netneutrality/context/MusicChannelContext.java

@@ -37,6 +37,11 @@ public class MusicChannelContext extends AbstractContext implements NoMessageCon
         return true;
     }
 
+    @Override
+    public boolean isFromGuild() {
+        return true;
+    }
+
     @Override
     public void deleteMessage() {
 

src/main/java/me/bobert/netneutrality/context/SlashCommandContext.java

@@ -33,6 +33,11 @@ public class SlashCommandContext extends CommandContext {
         return event.isAcknowledged();
     }
 
+    @Override
+    public boolean isFromGuild() {
+        return event.isFromGuild();
+    }
+
     @Override
     public InteractionHook getInteractionHook() {
         if (!event.isAcknowledged())

src/main/java/me/bobert/netneutrality/core/AsyncMessage.java

@@ -47,6 +47,11 @@ public class AsyncMessage extends AbstractContext {
         return true;
     }
 
+    @Override
+    public boolean isFromGuild() {
+        return false;
+    }
+
     @Override
     public void deleteMessage() {
         if (hook != null) {