new: introduce build-logic module to centralize Gradle configuration

shared/build.gradle.kts

@@ -1,15 +1,12 @@
-import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
-
 plugins {
-    alias(libs.plugins.kotlinMultiplatform)
-    alias(libs.plugins.androidMultiplatformLibrary)
-    alias(libs.plugins.composeMultiplatform)
-    alias(libs.plugins.composeCompiler)
+    id("gwenedeg.kmp.library")
+    id("gwenedeg.compose")
     alias(libs.plugins.kotlinSerialization)
 }
 
 kotlin {
+    // Targets are declared by the convention plugin; these calls return the
+    // existing targets, so this only adds the iOS framework packaging.
     listOf(
         iosArm64(),
         iosSimulatorArm64(),
@@ -20,31 +17,8 @@ kotlin {
         }
     }
 
-    jvm()
-
-    js {
-        browser()
-    }
-
-    @OptIn(ExperimentalWasmDsl::class)
-    wasmJs {
-        browser()
-    }
-
     androidLibrary {
         namespace = "fr.ajaury.gwenedeg.shared"
-        compileSdk =
-            libs.versions.androidCompileSdk
-                .get()
-                .toInt()
-        minSdk =
-            libs.versions.androidMinSdk
-                .get()
-                .toInt()
-
-        compilerOptions {
-            jvmTarget = JvmTarget.JVM_11
-        }
         androidResources {
             enable = true
         }
@@ -91,9 +65,6 @@ kotlin {
             implementation(libs.koin.compose)
             implementation(libs.koin.compose.viewmodel)
         }
-        commonTest.dependencies {
-            implementation(libs.kotlin.test)
-        }
         jvmTest.dependencies {
             // Koin configuration validation
             implementation(project.dependencies.platform(libs.koin.bom))