Reclassify renderer CSS as for-frameworks

Summary:
Reclassify the renderer CSS headers (`react/renderer/css/*.h`) as framework-tier APIs by switching them from the public umbrella guard to the for-frameworks guard. Framework integrations keep access to the fine-grained headers and acknowledge that usage by defining `RN_ALLOW_FRAMEWORKS`.

Remove the `React/CSS.h` umbrella and stop publishing it from Buck, CocoaPods, Android prefab, the iOS prebuild header config, and the iOS prebuild header linking step. Its only consumer, the attributed string conversions header (itself framework-tier), now includes the CSS headers it uses (`CSSFontVariant.h` and `CSSValueParser.h`) directly.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D119642784

Author: coado

packages/react-native/ReactAndroid/build.gradle.kts

@@ -143,7 +143,6 @@ val preparePrefab by
                       Pair("../ReactCommon/react/renderer/core/React/", "React/"),
                       // react_renderer_css
                       Pair("../ReactCommon/react/renderer/css/", "react/renderer/css/"),
-                      Pair("../ReactCommon/react/renderer/css/React/", "React/"),
                       // react_debug
                       Pair("../ReactCommon/react/debug/", "react/debug/"),
                       Pair("../ReactCommon/react/debug/React/", "React/"),

packages/react-native/ReactCommon/react/renderer/attributedstring/conversions.h

@@ -9,7 +9,6 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <React/CSS.h>
 #include <React/Debug.h>
 #include <React/RendererCore.h>
 #include <React/View.h>
@@ -18,6 +17,8 @@
 #include <react/renderer/attributedstring/ParagraphAttributes.h>
 #include <react/renderer/attributedstring/TextAttributes.h>
 #include <react/renderer/attributedstring/primitives.h>
+#include <react/renderer/css/CSSFontVariant.h>
+#include <react/renderer/css/CSSValueParser.h>
 #include <unordered_map>
 
 #ifdef RN_SERIALIZABLE_STATE

packages/react-native/ReactCommon/react/renderer/css/CSSAngle.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <optional>
 

packages/react-native/ReactCommon/react/renderer/css/CSSAngleUnit.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <cmath>
 #include <cstdint>

packages/react-native/ReactCommon/react/renderer/css/CSSBackgroundImage.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <optional>
 #include <variant>

packages/react-native/ReactCommon/react/renderer/css/CSSColor.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <optional>
 

packages/react-native/ReactCommon/react/renderer/css/CSSColorFunction.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <algorithm>
 #include <cmath>

packages/react-native/ReactCommon/react/renderer/css/CSSCompoundDataType.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <react/renderer/css/CSSDataType.h>
 

packages/react-native/ReactCommon/react/renderer/css/CSSDataType.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <any>
 #include <concepts>

packages/react-native/ReactCommon/react/renderer/css/CSSFilter.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/UmbrellaGuard.h>
+#include <react/cxxstableapi/FrameworksGuard.h>
 
 #include <array>
 #include <optional>