Implement featureScope/featureComponent support for @DevelopmentAppComponent

When `featureScope` and `featureComponent` are set on `@DevelopmentAppComponent`,
the compiler plugin now generates two additional types that redirect the
`FeatureProvider` binding from `ActivityScope` to the feature scope:

- `FeatureLoginScreenComponent`: a `@ContributesTo(featureScope)` interface
  extending `DevelopmentLoginScreenComponent`, making `FeatureProvider` available
  at the feature scope.
- `NoopLoginScreenComponent`: a `@ContributesTo(ActivityScope::class,
  replaces = [ContributedDevelopmentLoginScreenComponent::class])` interface that
  removes the default login screen component from `ActivityScope`, so
  `FeatureProvider` is no longer required there.

This matches what the KSP generator produced. Without these types, demo apps
with a feature scope fail to compile because
`ContributedDevelopmentLoginScreenComponent.featureProvider()` demands
`FeatureProvider` at `ActivityScope`, but the app only provides it at the
feature scope.

New stubs (minimal copies from android-register):
- `ActivityScope`, `FeatureProvider`, `DevelopmentLoginScreenComponent`,
  `ContributedDevelopmentLoginScreenComponent`, `DefaultFeatureModule`,
  `DevelopmentFeatureScopeComponent`

Tests:
- Box test: multi-module compilation verifying the graph compiles and runs
- FIR dump test: validates the generated FIR structure
- Integration test: `FeatureScopeDemoApp` with `featureScope`/`featureComponent`

Author: vRallev

compiler/api/compiler.api

@@ -25,6 +25,7 @@ public final class com/squareup/metro/extensions/SquareMetroExtensionsPluginRegi
 public final class com/squareup/metro/extensions/developmentapp/DevelopmentAppComponentFir : dev/zacsweers/metro/compiler/api/fir/MetroFirDeclarationGenerationExtension {
 	public fun <init> (Lorg/jetbrains/kotlin/fir/FirSession;)V
 	public fun generateNestedClassLikeDeclaration (Lorg/jetbrains/kotlin/fir/symbols/impl/FirClassSymbol;Lorg/jetbrains/kotlin/name/Name;Lorg/jetbrains/kotlin/fir/extensions/DeclarationGenerationContext$Nested;)Lorg/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol;
+	public fun getContributionHints ()Ljava/util/List;
 	public fun getNestedClassifiersNames (Lorg/jetbrains/kotlin/fir/symbols/impl/FirClassSymbol;Lorg/jetbrains/kotlin/fir/extensions/DeclarationGenerationContext$Nested;)Ljava/util/Set;
 	public fun registerPredicates (Lorg/jetbrains/kotlin/fir/extensions/FirDeclarationPredicateRegistrar;)V
 }
@@ -34,6 +35,17 @@ public final class com/squareup/metro/extensions/developmentapp/DevelopmentAppCo
 	public fun create (Lorg/jetbrains/kotlin/fir/FirSession;Ldev/zacsweers/metro/compiler/MetroOptions;)Ldev/zacsweers/metro/compiler/api/fir/MetroFirDeclarationGenerationExtension;
 }
 
+public final class com/squareup/metro/extensions/developmentapp/DevelopmentAppComponentMetroExtension : dev/zacsweers/metro/compiler/api/fir/MetroContributionExtension {
+	public fun <init> (Lorg/jetbrains/kotlin/fir/FirSession;)V
+	public fun getContributions (Lorg/jetbrains/kotlin/name/ClassId;)Ljava/util/List;
+	public fun registerPredicates (Lorg/jetbrains/kotlin/fir/extensions/FirDeclarationPredicateRegistrar;)V
+}
+
+public final class com/squareup/metro/extensions/developmentapp/DevelopmentAppComponentMetroExtension$Factory : dev/zacsweers/metro/compiler/api/fir/MetroContributionExtension$Factory {
+	public fun <init> ()V
+	public fun create (Lorg/jetbrains/kotlin/fir/FirSession;Ldev/zacsweers/metro/compiler/MetroOptions;)Ldev/zacsweers/metro/compiler/api/fir/MetroContributionExtension;
+}
+
 public final class com/squareup/metro/extensions/featureflag/ContributesFeatureFlagFir : dev/zacsweers/metro/compiler/api/fir/MetroFirDeclarationGenerationExtension {
 	public fun <init> (Lorg/jetbrains/kotlin/fir/FirSession;)V
 	public fun generateNestedClassLikeDeclaration (Lorg/jetbrains/kotlin/fir/symbols/impl/FirClassSymbol;Lorg/jetbrains/kotlin/name/Name;Lorg/jetbrains/kotlin/fir/extensions/DeclarationGenerationContext$Nested;)Lorg/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol;

compiler/src/main/kotlin/com/squareup/metro/extensions/ClassIds.kt

@@ -67,6 +67,8 @@ internal object ClassIds {
 
   val APPLICATION = ClassId(FqName("android.app"), Name.identifier("Application"))
 
+  val ACTIVITY_SCOPE = ClassId(FqName("com.squareup.dagger"), Name.identifier("ActivityScope"))
+
   val LOGIN_SCREEN_MODULE =
     ClassId(
       FqName("com.squareup.development.shell.login.screen"),
@@ -79,6 +81,31 @@ internal object ClassIds {
       Name.identifier("DevelopmentLoggedInComponent"),
     )
 
+  val DEVELOPMENT_LOGIN_SCREEN_COMPONENT =
+    ClassId(
+      FqName("com.squareup.development.shell.login.screen"),
+      Name.identifier("DevelopmentLoginScreenComponent"),
+    )
+
+  val CONTRIBUTED_DEVELOPMENT_LOGIN_SCREEN_COMPONENT =
+    ClassId(
+      FqName("com.squareup.development.shell.login.screen"),
+      Name.identifier("ContributedDevelopmentLoginScreenComponent"),
+    )
+
+  val DEFAULT_FEATURE_MODULE =
+    ClassId(FqName("com.squareup.development.shell"), Name.identifier("DefaultFeatureModule"))
+
+  val DEVELOPMENT_FEATURE_SCOPE_COMPONENT =
+    ClassId(
+      FqName("com.squareup.development.shell"),
+      Name.identifier("DevelopmentFeatureScopeComponent"),
+    )
+
+  val DAGGER_MODULE = ClassId(FqName("dagger"), Name.identifier("Module"))
+
+  val BINDS_INSTANCE = ClassId(FqName("dev.zacsweers.metro"), Name.identifier("Provides"))
+
   val JAVAX_QUALIFIER = ClassId(FqName("javax.inject"), Name.identifier("Qualifier"))
 
   val METRO_QUALIFIER = ClassId(FqName("dev.zacsweers.metro"), Name.identifier("Qualifier"))