fix(build): baseline configuration and proxy setup

- Downgrade AGP 9.0.0 -> 8.9.2, Kotlin 2.2.10 -> 2.1.20, KSP and Compose Multiplatform to compatible versions.
- Switch Gradle wrapper to 8.13 (8.11.1 download unavailable, 9.5.1 incompatible with AGP 8.9).
- Add Gradle proxy settings and disable SDK auto-download to prevent hangs on dl.google.com.
- Remove generated gradle-daemon-jvm.properties causing JetBrains JDK lookup failure.
- Fix JvmVendorSpec.ANY incompatibility on the new toolchain.
- Temporarily disable externalNativeBuild until NDK 27.0.12077973 is installed.
- Baseline ':app:tasks' now passes.

app/build.gradle.kts

@@ -46,7 +46,9 @@ fun configuredAppLocaleTags(): Set<String> {
 }
 
 kotlin {
-    jvmToolchain(21)
+    jvmToolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
 }
 
 android {
@@ -64,11 +66,13 @@ android {
             .map { it.toAndroidResourceConfiguration() }
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+/*
         externalNativeBuild {
             cmake {
                 cppFlags += ""
             }
         }
+*/
         buildConfigField("boolean", "IS_PRO", "false")
         buildConfigField("boolean", "IS_OFFLINE", "false")
     }
@@ -162,12 +166,14 @@ android {
         singleVariant("release") {
         }
     }
+/*
     externalNativeBuild {
         cmake {
             path = file("src/main/cpp/CMakeLists.txt")
             version = "3.22.1"
         }
     }
+*/
     testOptions {
         unitTests.isReturnDefaultValues = true
         unitTests.all {