feat:add readme info

README.md

@@ -1 +1,28 @@
-# qst-ext-appsearcher-rust
+# qst-ext-appsearcher-rust
+
+## Introduction
+This is a extension for the [qst](https://github.com/kumudiaorong/qst-grpc) written in rust. It is used to search the application in the system.
+
+## Getting Started
+
+### Get Release
+
+No release yet.
+
+### Build from source
+
+#### Dependencies
+First please install [rust](https://www.rust-lang.org/tools/install).
+
+Then see [tonic](https://github.com/hyperium/tonic) for other dependencies.
+
+#### Get Source
+```shell
+git clone https://github.com/kumudiaorong/qst-ext-appsearcher-rust.git
+git submodule update --init
+```
+
+#### Build
+```shell
+cargo build --release
+```