Set up project skeleton (milestone 1)

- Architecture and feature overview in docs/ARCHITECTURE.md
- Gradle 9.8 / AGP 9.4 / Kotlin 2.4 with version catalog and convention plugins
- Modules :app, :core:*, :device-profiles, :feature:* (placeholder screens)
- Flavors core (no INTERNET, enforced by a build check) and full
- Material You theme, navigation, expert mode and dry-run settings (DataStore)
- Pixel 8-10 device detection, unit tests, GPLv3 license, English README with Obtainium badge

Co-Authored-By: Claude Opus 5.5 <[email protected]>

settings.gradle.kts

@@ -0,0 +1,37 @@
+pluginManagement {
+    includeBuild("build-logic")
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "Pixelwall"
+
+include(":app")
+include(":core:model")
+include(":core:domain")
+include(":core:data")
+include(":core:system")
+include(":core:privileged")
+include(":core:ui")
+include(":core:testing")
+include(":device-profiles")
+include(":feature:dashboard")
+include(":feature:permissions")
+include(":feature:network")
+include(":feature:system")
+include(":feature:profiles")
+include(":feature:trackers")
+include(":feature:monitor")
+include(":feature:changelog")
+include(":feature:onboarding")