[resources] Mark new API as experimental.

components/resources/library/src/commonMain/kotlin/org/jetbrains/compose/resources/PluralStringResources.kt

@@ -55,6 +55,7 @@ suspend fun getPluralString(resource: PluralStringResource, quantity: Int): Stri
  *
  * @throws IllegalArgumentException If the provided ID or the pluralization is not found in the resource file.
  */
+@ExperimentalResourceApi
 suspend fun getPluralString(
     environment: ResourceEnvironment,
     resource: PluralStringResource,
@@ -129,6 +130,7 @@ suspend fun getPluralString(resource: PluralStringResource, quantity: Int, varar
  *
  * @throws IllegalArgumentException If the provided ID or the pluralization is not found in the resource file.
  */
+@ExperimentalResourceApi
 suspend fun getPluralString(
     environment: ResourceEnvironment,
     resource: PluralStringResource,

components/resources/library/src/commonMain/kotlin/org/jetbrains/compose/resources/StringArrayResources.kt

@@ -57,6 +57,7 @@ suspend fun getStringArray(resource: StringArrayResource): List<String> =
  *
  * @throws IllegalStateException if the string array with the given ID is not found.
  */
+@ExperimentalResourceApi
 suspend fun getStringArray(
     environment: ResourceEnvironment,
     resource: StringArrayResource

components/resources/library/src/commonMain/kotlin/org/jetbrains/compose/resources/StringResources.kt

@@ -50,6 +50,7 @@ suspend fun getString(resource: StringResource): String =
  *
  * @throws IllegalArgumentException If the provided ID is not found in the resource file.
  */
+@ExperimentalResourceApi
 suspend fun getString(environment: ResourceEnvironment, resource: StringResource): String =
     loadString(resource, DefaultResourceReader, environment)
 
@@ -108,6 +109,7 @@ suspend fun getString(resource: StringResource, vararg formatArgs: Any): String
  *
  * @throws IllegalArgumentException If the provided ID is not found in the resource file.
  */
+@ExperimentalResourceApi
 suspend fun getString(
     environment: ResourceEnvironment,
     resource: StringResource,