Use buildSrc to deduplicate build logic (#262)

orx-jvm/orx-osc/build.gradle.kts

@@ -1,6 +1,10 @@
+plugins {
+    org.openrndr.extra.convention.`kotlin-jvm`
+}
+
 dependencies {
     implementation(libs.javaosc.core) {
         exclude(group = "org.slf4j")
         exclude(group = "log4j")
     }
-}
+}