fix: auto-configure local Maven repo for shared-storage dependency

[roidayan1]

Summary

• Auto-configure the local Maven repository for shared-storage in the library's own build.gradle
• Remove the manual Android setup step from README, migration guide, and example project

Problem

The org.asyncstorage.shared_storage:storage-android:1.0.0 artifact is bundled in android/local_repo/ but is not published to Maven Central or Google's Maven repository. This means every consumer must manually add the local Maven URL to their root android/build.gradle:

allprojects {
    repositories {
        maven {
            url = uri(project(":react-native-async-storage_async-storage").file("local_repo"))
        }
    }
}

This is easy to miss during installation and causes confusing Gradle build failures (Could not find org.asyncstorage.shared_storage:storage-android:1.0.0).

Fix

Add the local Maven repository configuration directly to the library's packages/async-storage/android/build.gradle:

1. Module-level: maven { url("${project.projectDir}/local_repo") } — resolves the dependency for the module itself
2. rootProject.allprojects: maven { url("${rootDir}/../node_modules/...") } — ensures transitive resolution across the entire Android build

This makes it work out of the box — no manual setup required.

Changes

• packages/async-storage/android/build.gradle — add local Maven repo configuration
• README.md — remove manual Android setup section
• docs/migration-to-3.md — remove manual Android setup instructions
• examples/react-native/android/build.gradle — remove manual repo config (now inherited)

Patch (for patch-package users)

Until this is released, you can use this patch with patch-package:

@react-native-async-storage+async-storage+3.0.1.patch

diff --git a/node_modules/@react-native-async-storage/async-storage/android/build.gradle b/node_modules/@react-native-async-storage/async-storage/android/build.gradle
index 4f80202..19613fa 100644
--- a/node_modules/@react-native-async-storage/async-storage/android/build.gradle
+++ b/node_modules/@react-native-async-storage/async-storage/android/build.gradle
@@ -78,10 +78,21 @@ android {
 }

 repositories {
+    maven {
+        url("${project.projectDir}/local_repo")
+    }
     mavenCentral()
     google()
 }

+rootProject.allprojects {
+    repositories {
+        maven {
+            url("${rootDir}/../node_modules/@react-native-async-storage/async-storage/android/local_repo")
+        }
+    }
+}
+
 dependencies {
     implementation "com.facebook.react:react-android"
     api "org.asyncstorage.shared_storage:storage-android:1.0.0"

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