Converted all minor modules to .gradle.kts.

core-ui/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+  id("signal-library")
+}
+
+android {
+  namespace = "org.signal.core.ui"
+
+  buildFeatures {
+    compose = true
+  }
+
+  composeOptions {
+    kotlinCompilerExtensionVersion = "1.4.4"
+  }
+}
+
+dependencies {
+  lintChecks(project(":lintchecks"))
+
+  platform(libs.androidx.compose.bom).let { composeBom ->
+    api(composeBom)
+    androidTestApi(composeBom)
+  }
+
+  api(libs.androidx.compose.material3)
+  api(libs.androidx.compose.ui.tooling.preview)
+  debugApi(libs.androidx.compose.ui.tooling.core)
+}