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.

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,8 @@
 #Fri May 02 18:58:54 IST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+networkTimeout=120000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists