move tools under Nexus std

Author: tmsdkeys

SUMMARY.md

@@ -64,5 +64,5 @@
 ## 🛠️ Tools
 
 * [⚓ Nexus Standard Tools](tools/nexus-standard-tools.md)
-* [OpenAI Chat Completion](tools/llm-openai-chat-completion/README.md)
-* [Math](tools/math/README.md)
+  * [OpenAI Chat Completion](tools/llm-openai-chat-completion/README.md)
+  * [Math](tools/math/README.md)