Add bitcoinj submodule, move AddressTest into it

secp256k1-bitcoinj/build.gradle

@@ -0,0 +1,27 @@
+plugins {
+    id 'java-library'
+}
+
+tasks.withType(JavaCompile).configureEach {
+    //options.release = 9
+}
+
+ext.moduleName = 'org.bitcoinj.secp256k1.bitcoinj'
+
+dependencies {
+    api project(':secp256k1-api')
+    api project(':secp256k1-bouncy')
+    api project(':secp256k1-foreign')
+    api("org.bitcoinj:bitcoinj-core:0.17-alpha3");
+
+    implementation 'org.bouncycastle:bcprov-jdk18on:1.77'
+}
+
+jar {
+    inputs.property("moduleName", moduleName)
+    manifest {
+        attributes  'Implementation-Title': 'Secp256k1 bitcoinj support',
+                'Automatic-Module-Name': moduleName,
+                'Implementation-Version': archiveVersion.get()
+    }
+}

src/test/java/org/consensusj/secp256k1/bitcoinj/AddressTest.java → secp256k1-bitcoinj/src/test/java/org/bitcoinj/secp256k1/bitcoinj/AddressTest.java

@@ -1,4 +1,4 @@
-package org.consensusj.secp256k1.bitcoinj;
+package org.bitcoinj.secp256k1.bitcoinj;
 
 import org.bitcoinj.base.Address;
 import org.bitcoinj.base.BitcoinNetwork;

settings.gradle

@@ -3,6 +3,7 @@ rootProject.name = 'secp256k1-jdk'
 include 'secp256k1-api'               // API interface library
 include 'secp256k1-bouncy'            // Bouncy Castle implementation
 include 'secp256k1-foreign'           // Java Foreign Memory & Function ("Panama") implementation
+include 'secp256k1-bitcoinj'          // bitcoinj integration utilities and tests (P2TR address generation, etc.)
 include 'secp256k1-examples-java'     // Java examples
 include 'secp256k1-examples-kotlin'   // Kotlin examples
 include 'secp256k1-sandbox'           // Sandbox (experimental code that may be removed)