Add MemFree to tools (#81)

* Add memfree to tools

## Introduction

MemFree is a hybrid AI search engine that simultaneously performs searches on your personal knowledge base (such as bookmarks, notes, documents, etc.) and the Internet.

## Highlights

- Hybrid AI Search Engine
- Serverless and cloud native
- One-Click Chrome Bookmarks Sync and Index
- Support multiple traditional search engines as source
- Self-hosted Super Fast Serverless Vector Database
- Self-hosted Super Fast Local Embedding and Rerank Service
- Full Code Open Source
- One-Click Deployment On Production

* Update README.md

The name should be all lowercase

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Co-authored-by: Jimmy Song <[email protected]>

README.md

@@ -756,6 +756,7 @@ Cloud Native is a behavior and design philosophy. At its essence, any behavior o
 - [kuui](https://github.com/viveksinghggits/kuui) - UI that can be used to edit configmaps/secrets of your kubernetes cluster.
 - [kvdi](https://github.com/tinyzimmer/kvdi) - A Kubernetes-native Virtual Desktop Infrastructure.
 - [kwok](https://github.com/kubernetes-sigs/kwok) - Kubernetes WithOut Kubelet - Simulates thousands of Nodes and Clusters.
+- [memfree](https://github.com/memfreeme/memfree) - Open Source Hybrid AI Search Engine, Instantly Get Accurate Answers from the Internet, Bookmarks, Notes, and Docs. Support One-Click Deployment.
 - [microconfig](https://github.com/microconfig/microconfig) - Modern and simple way of microservice configuration management.
 - [microk8s](https://github.com/ubuntu/microk8s) - A kubernetes cluster in a snap.
 - [mindaro](https://github.com/microsoft/mindaro) - Bridge to Kubernetes - for Visual Studio and Visual Studio Code