[Rider] Attempt fix RIDER-116298

The problem was that RiderInitialProjectConfigurator.kt way of setting the default value didn't work properly in RemDev

GitOrigin-RevId: 68fbd70b23d42f72e8f26d81d87776a22c1aae3a

platform/platform-impl/api-dump-unreviewed.txt

@@ -727,6 +727,16 @@ f:com.intellij.buildfiles.ForcedBuildFileAttribute
 - s:belongsToFramework(com.intellij.openapi.vfs.VirtualFile,java.lang.String):Z
 - s:forceFileToFramework(com.intellij.openapi.vfs.VirtualFile,java.lang.String,Z):V
 - s:getFrameworkIdOfBuildFile(com.intellij.openapi.vfs.VirtualFile):java.lang.String
+com.intellij.codeInsight.actions.ReaderModeDefaultsOverride
+- sf:Companion:com.intellij.codeInsight.actions.ReaderModeDefaultsOverride$Companion
+- s:getInstance():com.intellij.codeInsight.actions.ReaderModeDefaultsOverride
+- a:getShowWarningsDefault():Z
+f:com.intellij.codeInsight.actions.ReaderModeDefaultsOverride$Companion
+- f:getInstance():com.intellij.codeInsight.actions.ReaderModeDefaultsOverride
+f:com.intellij.codeInsight.actions.ReaderModeDefaultsOverrideImpl
+- com.intellij.codeInsight.actions.ReaderModeDefaultsOverride
+- <init>():V
+- getShowWarningsDefault():Z
 com.intellij.codeInsight.actions.ReaderModeSettings
 - com.intellij.openapi.Disposable
 - sf:Companion:com.intellij.codeInsight.actions.ReaderModeSettings$Companion

platform/platform-impl/src/com/intellij/codeInsight/actions/ReaderModeSettings.kt

@@ -28,6 +28,20 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.jetbrains.annotations.ApiStatus.Internal
 
+/**
+ * Might be used for application-wide overriding of [ReaderModeSettings.kt] defaults.
+ * Useful when some product requires a different default value.
+ */
+interface ReaderModeDefaultsOverride {
+
+  companion object {
+    @JvmStatic
+    fun getInstance(): ReaderModeDefaultsOverride = ApplicationManager.getApplication().getService(ReaderModeDefaultsOverride::class.java)
+  }
+
+  val showWarningsDefault: Boolean
+}
+
 interface ReaderModeSettings : Disposable {
   companion object {
     private val EP_READER_MODE_PROVIDER = ExtensionPointName<ReaderModeProvider>("com.intellij.readerModeProvider")

platform/platform-impl/src/com/intellij/codeInsight/actions/ReaderModeSettingsImpl.kt

@@ -8,6 +8,10 @@ import com.intellij.openapi.editor.colors.EditorColorsManager
 import com.intellij.psi.codeStyle.CodeStyleScheme
 import kotlinx.coroutines.CoroutineScope
 
+class ReaderModeDefaultsOverrideImpl : ReaderModeDefaultsOverride {
+  override val showWarningsDefault = false
+}
+
 @State(name = "ReaderModeSettings", storages = [Storage(StoragePathMacros.PRODUCT_WORKSPACE_FILE)], perClient = true)
 class ReaderModeSettingsImpl(override val coroutineScope: CoroutineScope) : PersistentStateComponentWithModificationTracker<ReaderModeSettingsImpl.State>,
                                                                             ReaderModeSettings {
@@ -26,7 +30,7 @@ class ReaderModeSettingsImpl(override val coroutineScope: CoroutineScope) : Pers
     @get:ReportValue var increaseLineSpacing: Boolean by property(false)
     @get:ReportValue var showRenderedDocs: Boolean by property(true)
     @get:ReportValue var showInlayHints: Boolean by property(true)
-    @get:ReportValue var showWarnings: Boolean by property(false)
+    @get:ReportValue var showWarnings: Boolean by property(ReaderModeDefaultsOverride.getInstance().showWarningsDefault)
     @get:ReportValue var enabled: Boolean by property(Experiments.getInstance().isFeatureEnabled("editor.reader.mode"))
 
     var mode: ReaderMode = ReaderMode.LIBRARIES_AND_READ_ONLY

platform/platform-resources/src/META-INF/PlatformLangComponents.xml

@@ -162,6 +162,8 @@
 
     <applicationService serviceInterface="com.intellij.openapi.editor.impl.inspector.InspectionsSettingContentService" serviceImplementation="com.intellij.openapi.editor.impl.inspector.InspectionsSettingContentServiceImpl"/>
 
+    <applicationService serviceInterface="com.intellij.codeInsight.actions.ReaderModeDefaultsOverride"
+                        serviceImplementation="com.intellij.codeInsight.actions.ReaderModeDefaultsOverrideImpl" />
   </extensions>
 
   <!--suppress PluginXmlDynamicPlugin -->