Make default scheme shared so generated projects ship with one

Move NativeAppTemplate.xcscheme from xcuserdata/<user>/xcschemes/ to
xcshareddata/xcschemes/. xcuserdata is gitignored (correctly — it
holds per-developer Xcode state) which means anyone cloning fresh
opens the project without a scheme until Xcode auto-creates a default
one. The auto-default omits the run-time environment variable
injection (NATIVEAPPTEMPLATE_API_DOMAIN etc.) the substrate relies on,
so the app falls back to api.nativeapptemplate.com and dev workflows
break silently.

Shared schemes are conventional for any project meant to be cloned by
others — no per-user state in the file, just the build/run/test
configuration. Promoting the default scheme costs nothing and makes
the substrate work out-of-the-box for fresh clones, including the
nativeapptemplate-agent code generator's ./out/<slug>/ios/ outputs
(the agent's iOS worker copies the substrate but skips xcuserdata; it
does NOT skip xcshareddata, so the moved scheme rides along).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dadachi

NativeAppTemplate.xcodeproj/xcshareddata/xcschemes/NativeAppTemplate.xcscheme

@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "2630"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "011F6DEC259EF16400BED22E"
+               BuildableName = "NativeAppTemplate.app"
+               BlueprintName = "NativeAppTemplate"
+               ReferencedContainer = "container:NativeAppTemplate.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "01D19B422D4DE33500BDEAB7"
+               BuildableName = "NativeAppTemplateTests.xctest"
+               BlueprintName = "NativeAppTemplateTests"
+               ReferencedContainer = "container:NativeAppTemplate.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "011F6DEC259EF16400BED22E"
+            BuildableName = "NativeAppTemplate.app"
+            BlueprintName = "NativeAppTemplate"
+            ReferencedContainer = "container:NativeAppTemplate.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+         <CommandLineArgument
+            argument = "shopkeeperBackdoorToken FILL_THIS_IN"
+            isEnabled = "NO">
+         </CommandLineArgument>
+      </CommandLineArguments>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "NATIVEAPPTEMPLATE_API_SCHEME"
+            value = "http"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "NATIVEAPPTEMPLATE_API_DOMAIN"
+            value = "192.168.1.11"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "NATIVEAPPTEMPLATE_API_PORT"
+            value = "3000"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "011F6DEC259EF16400BED22E"
+            BuildableName = "NativeAppTemplate.app"
+            BlueprintName = "NativeAppTemplate"
+            ReferencedContainer = "container:NativeAppTemplate.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>