Move the Windows implementation to the internal package

Author: dkhalanskyjb

core/build.gradle.kts

@@ -324,7 +324,7 @@ tasks {
 
 val downloadWindowsZonesMapping by tasks.registering {
     description = "Updates the mapping between Windows-specific and usual names for timezones"
-    val output = "$projectDir/windows/src/WindowsZoneNames.kt"
+    val output = "$projectDir/windows/src/internal/WindowsZoneNames.kt"
     outputs.file(output)
     doLast {
         val initialFileContents = try { File(output).readBytes() } catch(e: Throwable) { ByteArray(0) }
@@ -358,7 +358,7 @@ val downloadWindowsZonesMapping by tasks.registering {
         val bos = ByteArrayOutputStream()
         PrintWriter(bos).use { out ->
             out.println("""// generated with gradle task `$name`""")
-            out.println("""package kotlinx.datetime""")
+            out.println("""package kotlinx.datetime.internal""")
             out.println("""internal val standardToWindows: Map<String, String> = mutableMapOf(""")
             for ((usualName, windowsName) in sortedMapping) {
                 out.println("  \"$usualName\" to \"$windowsName\",")

core/windows/src/TzdbInRegistry.kt renamed to core/windows/src/internal/TzdbInRegistry.kt

@@ -3,8 +3,9 @@
  * Use of this source code is governed by the Apache 2.0 License that can be found in the LICENSE.txt file.
  */
 @file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
-package kotlinx.datetime
+package kotlinx.datetime.internal
 
+import kotlinx.datetime.*
 import kotlinx.cinterop.*
 import kotlinx.datetime.internal.*
 import platform.windows.*

core/windows/src/WindowsZoneNames.kt renamed to core/windows/src/internal/WindowsZoneNames.kt

@@ -1,5 +1,5 @@
 // generated with gradle task `downloadWindowsZonesMapping`
-package kotlinx.datetime
+package kotlinx.datetime.internal
 internal val standardToWindows: Map<String, String> = mutableMapOf(
   "Africa/Abidjan" to "Greenwich Standard Time",
   "Africa/Accra" to "Greenwich Standard Time",