Initial Kotlin setup and migrate YogaConstants (#1829)

Summary:
X-link: https://github.com/facebook/react-native/pull/53133

# Changelog:
[Internal] -

As part of the ongoing effort to migrate the React Native codebase to Kotlin, this PR introduces the initial setup required for Kotlin support in Yoga.

- Added initial basic Kotlin configuration to the project.
- Migrated `YogaConstants` as an initial file to try out the first migration steps.

Pull Request resolved: https://github.com/facebook/yoga/pull/1829

Test Plan:
- Tested the migrated class directly against facebook/react-native, see the PR [here](https://github.com/facebook/react-native/pull/52998).
- Run: `./gradlew :yoga:assembleDebug` & `./gradlew :yoga:compileDebugSources`

I am not able to run the Java tests in this repo (even before the initial Kotlin setup) – not sure if I am missing something there but any pointers are welcome – it seems like there is some missing configuration. Currently trying with `./gradlew :yoga:test`

Reviewed By: cortinico

Differential Revision: D79545992

Pulled By: rshest

fbshipit-source-id: 8257ff53e6b6f2436980be98b6c94e1ac526b207

java/com/facebook/yoga/YogaConstants.java

@@ -1,25 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.yoga;
-
-public class YogaConstants {
-
-  public static final float UNDEFINED = Float.NaN;
-
-  public static boolean isUndefined(float value) {
-    return Float.compare(value, UNDEFINED) == 0;
-  }
-
-  public static boolean isUndefined(YogaValue value) {
-    return value.unit == YogaUnit.UNDEFINED;
-  }
-
-  public static float getUndefined() {
-    return UNDEFINED;
-  }
-}

java/com/facebook/yoga/YogaConstants.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.yoga
+
+public object YogaConstants {
+  @JvmField public val UNDEFINED: Float = Float.NaN
+
+  @JvmStatic public fun isUndefined(value: Float): Boolean = value.compareTo(UNDEFINED) == 0
+
+  @JvmStatic public fun isUndefined(value: YogaValue): Boolean = value.unit == YogaUnit.UNDEFINED
+
+  @JvmStatic public fun getUndefined(): Float = UNDEFINED
+}