refactor: Modularize the project

source-api/build.gradle.kts

@@ -0,0 +1,42 @@
+plugins {
+    kotlin("multiplatform")
+    kotlin("plugin.serialization")
+    id("com.android.library")
+}
+
+kotlin {
+    androidTarget()
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                api(kotlinx.serialization.json)
+                api(libs.injekt.core)
+                api(libs.rxjava)
+                api(libs.jsoup)
+            }
+        }
+        val androidMain by getting {
+            dependencies {
+                implementation(projects.core)
+                api(androidx.preference)
+
+                // Workaround for https://youtrack.jetbrains.com/issue/KT-57605
+                implementation(kotlinx.coroutines.android)
+                implementation(project.dependencies.platform(kotlinx.coroutines.bom))
+            }
+        }
+    }
+}
+android {
+    namespace = "eu.kanade.tachiyomi.source"
+    defaultConfig {
+        consumerProguardFile("consumer-proguard.pro")
+    }
+}
+tasks {
+    withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+        kotlinOptions.freeCompilerArgs += listOf(
+            "-Xexpect-actual-classes",
+        )
+    }
+}