Add an Apple Watch face complication that opens the app

A static WidgetKit accessory widget (launcher only — no data sharing,
App Group, or entitlements). Tapping any accessory widget opens its
containing app, so this is enough to place a Workouts button on the
watch face. Supports the circular, corner, inline, and rectangular
accessory families.

New 'Workouts Watch Widget' app-extension target embedded in the watch
app via project.yml.

project.yml

@@ -78,6 +78,9 @@ targets:
         excludes:
           - "Resources/Info-*.plist"
           - "Resources/*.entitlements"
+    dependencies:
+      - target: Workouts Watch Widget
+        embed: true
     postBuildScripts:
       - script: '"${SRCROOT}/Scripts/update_build_number.sh"'
         name: Update Build Number
@@ -98,3 +101,20 @@ targets:
         ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME: AccentColor
         TARGETED_DEVICE_FAMILY: "4"
         DEVELOPMENT_ASSET_PATHS: "\"Workouts Watch App/Preview Content\""
+
+  # ---- watchOS widget extension (a launcher complication for the watch face) --
+  Workouts Watch Widget:
+    type: app-extension
+    platform: watchOS
+    sources:
+      - path: Workouts Watch Widget
+        excludes:
+          - "Resources/Info-*.plist"
+    settings:
+      base:
+        PRODUCT_BUNDLE_IDENTIFIER: dev.rzen.indie.Workouts.watchkitapp.widget
+        INFOPLIST_FILE: "Workouts Watch Widget/Resources/Info-WatchWidget.plist"
+        GENERATE_INFOPLIST_FILE: false
+        SWIFT_STRICT_CONCURRENCY: complete
+        WATCHOS_DEPLOYMENT_TARGET: "26.0"
+        TARGETED_DEVICE_FAMILY: "4"