Add client rendering and collision optimizations with parity tests

client/build.gradle

@@ -1,2 +1,31 @@
 version = '0.1.0'
 base.archivesName = 'saltatory-client'
+
+repositories {
+    maven {
+        url = 'https://maven.createmod.net'
+        content {
+            includeGroup 'net.createmod.ponder'
+            includeGroup 'dev.engine-room.flywheel'
+        }
+    }
+    maven {
+        url = 'https://api.modrinth.com/maven'
+        content { includeGroup 'maven.modrinth' }
+    }
+}
+
+configurations { testImplementation.extendsFrom compileOnly }
+
+dependencies {
+    compileOnly('net.createmod.ponder:ponder-neoforge:1.0.82+mc1.21.1') { transitive = false }
+    compileOnly('maven.modrinth:iris:t3ruzodq') { transitive = false }
+    compileOnly('dev.engine-room.flywheel:flywheel-neoforge-1.21.1:1.0.6') { transitive = false }
+    testImplementation 'org.ow2.asm:asm-tree:9.8'
+    testImplementation 'org.ow2.asm:asm-commons:9.8'
+}
+
+tasks.named('test') {
+    workingDir layout.buildDirectory.dir('test-work')
+    doFirst { workingDir.mkdirs() }
+}