feat: add menu bar app and bundle script

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scripts/make-app.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+swift build -c release --product Sst
+BIN=".build/release/Sst"
+APP="build/Sst.app"
+
+rm -rf "$APP"
+mkdir -p "$APP/Contents/MacOS" "$APP/Contents/Resources"
+cp "$BIN" "$APP/Contents/MacOS/Sst"
+# SwiftPM resource bundles (if any dependency ships them) live next to the binary.
+for b in .build/release/*.bundle; do
+  [ -e "$b" ] && cp -R "$b" "$APP/Contents/Resources/"
+done
+
+cat > "$APP/Contents/Info.plist" <<'PLIST'
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleIdentifier</key><string>local.sst.app</string>
+  <key>CFBundleName</key><string>Sst</string>
+  <key>CFBundleExecutable</key><string>Sst</string>
+  <key>CFBundlePackageType</key><string>APPL</string>
+  <key>CFBundleShortVersionString</key><string>0.1.0</string>
+  <key>CFBundleVersion</key><string>1</string>
+  <key>LSMinimumSystemVersion</key><string>14.0</string>
+  <key>LSUIElement</key><true/>
+  <key>NSMicrophoneUsageDescription</key>
+  <string>Sst neemt je stem op zolang je Fn ingedrukt houdt, om die lokaal naar tekst om te zetten.</string>
+</dict>
+</plist>
+PLIST
+
+codesign --force --sign - --identifier local.sst.app "$APP"
+echo "Gebouwd: $APP"