Add string catalog scaffolding for UI targets

Empty Localizable.xcstrings per UI package and for the app target,
defaultLocalization on the package, en-GB as a known region, and the
test plans pinned to en so hosted tests never follow the runner's
language.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Brew-UI.xctestplan

@@ -9,6 +9,8 @@
     }
   ],
   "defaultOptions" : {
+    "language" : "en",
+    "region" : "US",
     "screenshotDestination" : "testRunnerAndAttachments",
     "testExecutionOrdering" : "random",
     "testTimeoutsEnabled" : true,

Brew-Unit.xctestplan

@@ -9,6 +9,8 @@
     }
   ],
   "defaultOptions" : {
+    "language" : "en",
+    "region" : "US",
     "testTimeoutsEnabled" : true
   },
   "testTargets" : [

Homebrew.xcodeproj/project.pbxproj

@@ -344,6 +344,7 @@
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
+				"en-GB",
 				Base,
 			);
 			mainGroup = EEC39EB62F5AB4B900269514;

Homebrew/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Package.swift

@@ -3,6 +3,7 @@ import PackageDescription
 
 let package = Package(
     name: "BrewKit",
+    defaultLocalization: "en",
     platforms: [
         .macOS("26.0"),
     ],
@@ -86,9 +87,10 @@ let package = Package(
         ),
         .target(
             name: "BrewUIComponents",
-            dependencies: ["BrewAccessibilityID", "BrewCore"],
+            dependencies: ["BrewAccessibilityID", "BrewCore", "BrewRepositoryInterfaces"],
             resources: [
                 .process("Resources/Media.xcassets"),
+                .process("Resources/Localizable.xcstrings"),
             ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
@@ -170,6 +172,9 @@ let package = Package(
                 "BrewRepositoryInterfaces",
                 "BrewAppEnvironment",
             ],
+            resources: [
+                .process("Resources/Localizable.xcstrings"),
+            ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
                 .swiftLanguageMode(.v6),
@@ -183,6 +188,9 @@ let package = Package(
                 "BrewUIComponents",
                 "BrewRepositoryInterfaces",
             ],
+            resources: [
+                .process("Resources/Localizable.xcstrings"),
+            ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
                 .swiftLanguageMode(.v6),
@@ -197,6 +205,9 @@ let package = Package(
                 "BrewRepositoryInterfaces",
                 "BrewAppEnvironment",
             ],
+            resources: [
+                .process("Resources/Localizable.xcstrings"),
+            ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
                 .swiftLanguageMode(.v6),
@@ -211,6 +222,9 @@ let package = Package(
                 "BrewRepositoryInterfaces",
                 "BrewAppEnvironment",
             ],
+            resources: [
+                .process("Resources/Localizable.xcstrings"),
+            ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
                 .swiftLanguageMode(.v6),
@@ -225,6 +239,9 @@ let package = Package(
                 "BrewRepositoryInterfaces",
                 "BrewAppEnvironment",
             ],
+            resources: [
+                .process("Resources/Localizable.xcstrings"),
+            ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
                 .swiftLanguageMode(.v6),
@@ -239,6 +256,9 @@ let package = Package(
                 "BrewRepositoryInterfaces",
                 "BrewAppEnvironment",
             ],
+            resources: [
+                .process("Resources/Localizable.xcstrings"),
+            ],
             swiftSettings: [
                 .defaultIsolation(MainActor.self),
                 .swiftLanguageMode(.v6),

Sources/BrewFeatureConfig/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Sources/BrewFeatureConsole/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Sources/BrewFeatureDiscover/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Sources/BrewFeatureDoctor/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Sources/BrewFeatureInstalled/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Sources/BrewFeatureSelfUpgrade/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}

Sources/BrewUIComponents/Resources/Localizable.xcstrings

@@ -0,0 +1,7 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+
+  },
+  "version" : "1.0"
+}