refactor: split up core into multiple modules

common/build.gradle.kts

@@ -0,0 +1,14 @@
+plugins {
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.kotlinSerialization)
+}
+
+kotlin {
+    jvm()
+
+    sourceSets {
+        commonMain.dependencies {
+            implementation(libs.kotlinx.serialization.core)
+        }
+    }
+}

common/src/commonMain/kotlin/moe/lava/neon/common/captcha/CaptchaRequest.kt

@@ -0,0 +1,14 @@
+package moe.lava.neon.common.captcha
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class CaptchaRequest(
+    val captchaKey: List<String>,
+    val captchaService: String,
+    val captchaSitekey: String?,
+    val captchaSessionId: String?,
+    val captchaRqdata: String?,
+    val captchaRqtoken: String?,
+    val shouldServeInvisible: Boolean? = false,
+)

common/src/commonMain/kotlin/moe/lava/neon/common/captcha/CaptchaResponse.kt

@@ -0,0 +1,6 @@
+package moe.lava.neon.common.captcha
+
+sealed class CaptchaResponse {
+    data class Success(val token: String) : CaptchaResponse()
+    data class Failed(val error: Throwable) : CaptchaResponse()
+}