Scaffold tsjetpiti: on-device Qwen3.5-2B chat app

Android app that runs an uncensored Qwen3.5-2B GGUF fully on-device via an
embedded llama.cpp (pinned b10333, built through the NDK) behind a barebones
WebView chat UI. Model is downloaded on first launch. "new tsjet" wipes the
conversation and resets the KV cache.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,18 @@
+# Android / Gradle
+.gradle/
+build/
+/local.properties
+/captures/
+.cxx/
+.externalNativeBuild/
+
+# IDE
+*.iml
+.idea/
+
+# Artifacts
+*.apk
+*.aab
+
+# Never commit model weights
+*.gguf