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.

local.properties.example

@@ -0,0 +1,16 @@
+# Copy this file to local.properties (which is gitignored) and edit the paths
+# for your machine.
+
+# Android SDK location. Required for any Android build.
+# Android Studio's setup wizard installs to ~/Library/Android/sdk by default.
+# Alternative: brew install --cask android-commandlinetools (path would be
+# /usr/local/share/android-commandlinetools or /opt/homebrew/share/android-commandlinetools).
+sdk.dir=/Users/YOUR_USERNAME/Library/Android/sdk
+
+# JDK 21 home. AGP 8.7.x supports JDK 17 / 21 — JDK 26 is too new for AGP.
+# This project's gradle wrapper runs on whatever JAVA_HOME points to.
+# Either:
+#   (a) export JAVA_HOME=/usr/local/opt/openjdk@21/libexec/openjdk.jdk/Contents/Home
+#       in your shell profile
+#   (b) put the line below into ~/.gradle/gradle.properties (NOT project gradle.properties):
+#       org.gradle.java.home=/usr/local/opt/openjdk@21/libexec/openjdk.jdk/Contents/Home