Create README.md (#10)

Author: uglide

README.md

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+# Token-based Authentication Providers for Redis Java clients
+
+This extension provides Token-based Authentication for Redis Java client libraries([lettuce](https://github.com/redis/lettuce) and [Jedis](https://github.com/redis/jedis)) to support token-based authentication. 
+
+## Microsoft Entra ID provider
+
+### Installation 
+To install the Java packages, add the following dependencies to your `pom.xml` file if you're using Maven:
+```xml
+<dependency>
+    <groupId>redis.clients.authentication</groupId>
+    <artifactId>redis-authx-entraid</artifactId>
+    <version>0.1.1-beta1</version>
+</dependency>
+```
+If you're using Gradle, add the following dependencies to your `build.gradle` file:
+
+```
+implementation 'redis.clients.authentication:redis-authx-entraid:0.1.1-beta1'
+```
+
+### Quick Start
+Basic usage would look like this:
+```java
+    TokenAuthConfig tokenAuthConfig = EntraIDTokenAuthConfigBuilder.builder()
+        .clientId("YOUR_CLIENT_ID").secret("YOUR_SECRET")
+        .authority("YOUR_AUTHORITY").scopes("SCOPES").build();
+```
+With the `tokenAuthConfig` provided, both Jedis and Lettuce clients can automatically handle Reauthentication with EntraID.
+
+Refer to the [test files](https://github.com/redis/tbd-auth-entraid/tree/main/entraid/src/test/java/redis/clients/authentication) for more examples and detailed usage.