added more specific exceptions

abstracto-application/abstracto-modules/modmail/modmail-int/src/main/java/dev/sheldan/abstracto/modmail/exception/ModMailThreadNotFoundException.java

@@ -0,0 +1,28 @@
+package dev.sheldan.abstracto.modmail.exception;
+
+import dev.sheldan.abstracto.core.exception.AbstractoRunTimeException;
+import dev.sheldan.abstracto.templating.Templatable;
+
+import java.util.HashMap;
+
+public class ModMailThreadNotFoundException extends AbstractoRunTimeException implements Templatable {
+
+    private Long modMailThreadId;
+
+    public ModMailThreadNotFoundException(Long modMailThreadId) {
+        super("");
+        this.modMailThreadId = modMailThreadId;
+    }
+
+    @Override
+    public String getTemplateName() {
+        return "modmail_cannot_find_modmail_thread_exception_text";
+    }
+
+    @Override
+    public Object getTemplateModel() {
+        HashMap<String, Long> params = new HashMap<>();
+        params.put("id", this.modMailThreadId);
+        return params;
+    }
+}