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.

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/bg_dark" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/bg_dark" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>