Feat/fontweight number value (#34598)

Summary:
This PR adds support for number values for `fontWeight` as requested in https://github.com/facebook/react-native/issues/34425.

## Changelog

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[General] [Added] - Added support for number values in fontWeight.

Pull Request resolved: https://github.com/facebook/react-native/pull/34598

Test Plan:
```js
<Text style={{ fontWeight: 900, color: 'red' }}>
  Hello World
</Text>
```

Reviewed By: jacdebug

Differential Revision: D39268920

Pulled By: cipolleschi

fbshipit-source-id: 9bb711677bf173f9904b74f382659042856efd83

Libraries/StyleSheet/StyleSheetTypes.js

@@ -566,6 +566,23 @@ export type ____ViewStyle_Internal = $ReadOnly<{
   ...____ViewStyle_InternalOverrides,
 }>;
 
+export type FontStyleType = {
+  fontFamily: string,
+  fontWeight: ____FontWeight_Internal,
+};
+
+export type FontStyleMap = {
+  ultraLight: FontStyleType,
+  thin: FontStyleType,
+  light: FontStyleType,
+  regular: FontStyleType,
+  medium: FontStyleType,
+  semibold: FontStyleType,
+  bold: FontStyleType,
+  heavy: FontStyleType,
+  black: FontStyleType,
+};
+
 export type ____FontWeight_Internal =
   | 'normal'
   | 'bold'
@@ -577,7 +594,26 @@ export type ____FontWeight_Internal =
   | '600'
   | '700'
   | '800'
-  | '900';
+  | '900'
+  | 100
+  | 200
+  | 300
+  | 400
+  | 500
+  | 600
+  | 700
+  | 800
+  | 900
+  | 'ultralight'
+  | 'thin'
+  | 'light'
+  | 'medium'
+  | 'regular'
+  | 'semibold'
+  | 'condensedBold'
+  | 'condensed'
+  | 'heavy'
+  | 'black';
 
 export type ____TextStyle_InternalCore = $ReadOnly<{
   ...$Exact<____ViewStyle_Internal>,

Libraries/Text/Text.js

@@ -14,13 +14,13 @@ import Platform from '../Utilities/Platform';
 import * as PressabilityDebug from '../Pressability/PressabilityDebug';
 import usePressability from '../Pressability/usePressability';
 import StyleSheet from '../StyleSheet/StyleSheet';
+import flattenStyle from '../StyleSheet/flattenStyle';
 import processColor from '../StyleSheet/processColor';
 import TextAncestor from './TextAncestor';
 import {NativeText, NativeVirtualText} from './TextNativeComponent';
 import {type TextProps} from './TextProps';
 import * as React from 'react';
 import {useContext, useMemo, useState} from 'react';
-import flattenStyle from '../StyleSheet/flattenStyle';
 
 /**
  * Text is the fundamental component for displaying text.
@@ -201,6 +201,12 @@ const Text: React.AbstractComponent<
     default: accessible,
   });
 
+  let flattenedStyle = flattenStyle(style);
+
+  if (typeof flattenedStyle?.fontWeight === 'number') {
+    flattenedStyle.fontWeight = flattenedStyle?.fontWeight.toString();
+  }
+
   return hasTextAncestor ? (
     <NativeVirtualText
       {...restProps}
@@ -213,7 +219,7 @@ const Text: React.AbstractComponent<
       nativeID={id ?? nativeID}
       numberOfLines={numberOfLines}
       selectionColor={selectionColor}
-      style={style}
+      style={flattenedStyle}
       ref={forwardedRef}
     />
   ) : (
@@ -232,7 +238,7 @@ const Text: React.AbstractComponent<
         nativeID={id ?? nativeID}
         numberOfLines={numberOfLines}
         selectionColor={selectionColor}
-        style={style}
+        style={flattenedStyle}
         ref={forwardedRef}
       />
     </TextAncestor.Provider>

packages/rn-tester/js/examples/Text/TextExample.android.js

@@ -392,6 +392,15 @@ class TextExample extends React.Component<{...}> {
           <Text style={{fontWeight: '300'}}>FONT WEIGHT 300</Text>
           <Text style={{fontWeight: '200'}}>FONT WEIGHT 200</Text>
           <Text style={{fontWeight: '100'}}>FONT WEIGHT 100</Text>
+          <Text style={{fontWeight: 900}}>FONT WEIGHT 900</Text>
+          <Text style={{fontWeight: 800}}>FONT WEIGHT 800</Text>
+          <Text style={{fontWeight: 700}}>FONT WEIGHT 700</Text>
+          <Text style={{fontWeight: 600}}>FONT WEIGHT 600</Text>
+          <Text style={{fontWeight: 500}}>FONT WEIGHT 500</Text>
+          <Text style={{fontWeight: 400}}>FONT WEIGHT 400</Text>
+          <Text style={{fontWeight: 300}}>FONT WEIGHT 300</Text>
+          <Text style={{fontWeight: 200}}>FONT WEIGHT 200</Text>
+          <Text style={{fontWeight: 100}}>FONT WEIGHT 100</Text>
         </RNTesterBlock>
         <RNTesterBlock title="Font Style">
           <Text style={{fontStyle: 'italic'}}>Move fast and be italic</Text>

packages/rn-tester/js/examples/Text/TextExample.ios.js

@@ -681,6 +681,15 @@ exports.examples = [
           <Text style={{fontWeight: '300'}}>FONT WEIGHT 300</Text>
           <Text style={{fontWeight: '200'}}>FONT WEIGHT 200</Text>
           <Text style={{fontWeight: '100'}}>FONT WEIGHT 100</Text>
+          <Text style={{fontWeight: 900}}>FONT WEIGHT 900</Text>
+          <Text style={{fontWeight: 800}}>FONT WEIGHT 800</Text>
+          <Text style={{fontWeight: 700}}>FONT WEIGHT 700</Text>
+          <Text style={{fontWeight: 600}}>FONT WEIGHT 600</Text>
+          <Text style={{fontWeight: 500}}>FONT WEIGHT 500</Text>
+          <Text style={{fontWeight: 400}}>FONT WEIGHT 400</Text>
+          <Text style={{fontWeight: 300}}>FONT WEIGHT 300</Text>
+          <Text style={{fontWeight: 200}}>FONT WEIGHT 200</Text>
+          <Text style={{fontWeight: 100}}>FONT WEIGHT 100</Text>
         </View>
       );
     },