Explicit Api mode: Renamings after design discussions

Change CLI flag to -Xexplicit-api=strict|warning. 'Disable' state and 'mode' suffix are left out as implementation details.

Change intention title to 'make X public explicitly'

Do not report 'no explicit visibility' on property accessors

Set DECLARATION_SIGNATURE as a range for report

Rename internal diagnostic from _MIGRATION to _WARNING

compiler/util/src/org/jetbrains/kotlin/config/AnalysisFlag.kt

@@ -39,7 +39,7 @@ class AnalysisFlag<out T> internal constructor(
         }
 
         object ApiModeDisabledByDefault {
-            operator fun provideDelegate(instance: Any?, property: KProperty<*>) = Delegate(property.name, ApiMode.DISABLED)
+            operator fun provideDelegate(instance: Any?, property: KProperty<*>) = Delegate(property.name, ExplicitApiMode.DISABLED)
         }
 
         object ListOfStrings {

compiler/util/src/org/jetbrains/kotlin/config/ExplicitApiMode.kt

@@ -5,13 +5,13 @@
 
 package org.jetbrains.kotlin.config
 
-enum class ApiMode(val state: String) {
+enum class ExplicitApiMode(val state: String) {
     DISABLED("disable"),
-    ENABLED("enable"),
-    MIGRATION("migration");
+    STRICT("strict"),
+    WARNING("warning");
 
     companion object {
-        fun fromString(string: String): ApiMode? = values().find { it.state == string }
+        fun fromString(string: String): ExplicitApiMode? = values().find { it.state == string }
 
         fun availableValues() = values().joinToString(prefix = "{", postfix = "}") { it.state }
     }