feat: icon cluster connection

contracts/javascore/cluster-connection/build.gradle

@@ -0,0 +1,55 @@
+version = '0.1.0'
+
+dependencies {
+    implementation project(':xcall-lib')
+
+    testImplementation 'org.bouncycastle:bcprov-jdk15on:1.70'
+    testImplementation 'foundation.icon:javaee-unittest:0.11.1'
+    testImplementation project(':test-lib')
+}
+
+test {
+    useJUnitPlatform()
+    finalizedBy jacocoTestReport
+}
+
+optimizedJar {
+    dependsOn(project(':xcall-lib').jar)
+    mainClassName = 'xcall.adapter.cluster.ClusterConnection'
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    from {
+        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+    }
+}
+
+deployJar {
+    endpoints {
+        berlin {
+            uri = 'https://berlin.net.solidwallet.io/api/v3'
+            nid = 0x7
+        }
+        lisbon {
+            uri = 'https://lisbon.net.solidwallet.io/api/v3'
+            nid = 0x2
+        }
+        local {
+            uri = 'http://localhost:9082/api/v3'
+            nid = 0x3
+        }
+        mainnet {
+            uri = 'https://ctz.solidwallet.io/api/v3'
+            nid = 0x1
+        }
+        uat {
+            uri = project.findProperty('uat.host') as String
+            nid = property('uat.nid') as Integer
+            to = "$mockDApp"?:null
+        }
+    }
+    keystore = rootProject.hasProperty('keystoreName') ? "$keystoreName" : ''
+    password = rootProject.hasProperty('keystorePass') ? "$keystorePass" : ''
+    parameters {
+        arg('_relayer', "hxb6b5791be0b5ef67063b3c10b840fb81514db2fd")
+        arg('_xCall', "$xCall")
+    }
+}