Add OVERWATCH v0.1.0 — full detection engine + polish

Phase 1 (BLE), Phase 2 (WiFi BSSID/SSID), Phase 3 (DeFlock map proximity),
Phase 4 (Waze live POLICE alerts), and Phase 5 polish all wired through one
DetectionStore. Confidence engine scores 0-100; UI maps to 4-tier circle.

Polish:
  - Stylized two-line app title: [DЯΣΛMMΛKΣЯ] // 0VΣЯW4TCH
  - Modal bottom sheet for source drill-down (tap circle)
  - Settings screen: per-source toggles, proximity sliders, theme select
  - SharedPreferences-backed Settings with StateFlow exposure
  - DetectionService respects per-source toggles at start time
  - Scanners read proximity overrides via supplier lambdas

README documents all sources, architecture, build steps, permissions, and
the legal disclaimer.

gradle.properties

@@ -0,0 +1,8 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+org.gradle.configuration-cache=true
+org.gradle.caching=true
+
+android.useAndroidX=true
+android.nonTransitiveRClass=true
+
+kotlin.code.style=official