feat: basic api, captcha, and login flow

whew, that's a lot

ui/build.gradle.kts

@@ -24,6 +24,9 @@ kotlin {
         androidMain.dependencies {
             implementation(libs.compose.uiToolingPreview)
             implementation(libs.androidx.activity.compose)
+
+            implementation(libs.androidx.appcompat)
+            implementation(libs.hcaptcha.compose)
         }
         commonMain.dependencies {
             implementation(project(":core"))
@@ -79,11 +82,13 @@ android {
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
+        isCoreLibraryDesugaringEnabled = true
     }
 }
 
 dependencies {
     debugImplementation(libs.compose.uiTooling)
+    coreLibraryDesugaring(libs.desugar)
 }
 
 compose.desktop {