README updated with gradle integration

Author: rp-bg

README.md

@@ -19,6 +19,8 @@ Both implementations are designed to be immutable and provide type-safe access t
 
 ## Installation
 
+### Maven
+
 Add the following dependency to your `pom.xml`:
 
 ```xml
@@ -29,6 +31,24 @@ Add the following dependency to your `pom.xml`:
 </dependency>
 ```
 
+### Gradle
+
+Add the following dependency to your `build.gradle`:
+
+```gradle
+dependencies {
+    implementation 'com.appxiom.ax:ax-tuple:1.0.8'
+}
+```
+
+Or in `build.gradle.kts`:
+
+```kotlin
+dependencies {
+    implementation("com.appxiom.ax:ax-tuple:1.0.8")
+}
+```
+
 ## Usage
 
 ### Using `Tuple`