Reduce <Text> nesting (#6615)

* Move isOnlyEmoji out of RichText

To fix Fast Refresh.

* Make renderChildrenWithEmoji work with any children

* Always go through UITextView for consistency

It already contains the `selectable` and `iOS` checks inside.

* Move `emoji` check into `renderChildrenWithEmoji`

* Remove unnecessary intermediate UITextView nodes

* Make childHasEmoji check recursive

It didn't handle nested arrays etc correctly before.

* Remove the "children must be string" limitation

Should not be necessary now that we correctly handle nested arrays etc.

* Fix unnecessary regex reallocation

This doesn't have a global flag so it's okay to reuse.

* Remove unnecessary <Text> wrapper in RichText

src/view/com/util/text/Text.tsx

@@ -1,5 +1,5 @@
 import React from 'react'
-import {StyleSheet, Text as RNText, TextProps} from 'react-native'
+import {StyleSheet, TextProps} from 'react-native'
 import {UITextView} from 'react-native-uitextview'
 
 import {lh, s} from '#/lib/styles'
@@ -9,7 +9,6 @@ import {isIOS, isWeb} from '#/platform/detection'
 import {applyFonts, useAlf} from '#/alf'
 import {
   childHasEmoji,
-  childIsString,
   renderChildrenWithEmoji,
   StringChild,
 } from '#/alf/typography'
@@ -56,10 +55,6 @@ function Text_DEPRECATED({
         `Text: emoji detected but emoji not enabled: "${children}"\n\nPlease add <Text emoji />'`,
       )
     }
-
-    if (emoji && !childIsString(children)) {
-      logger.error('Text: when <Text emoji />, children can only be strings.')
-    }
   }
 
   const textProps = React.useMemo(() => {
@@ -107,19 +102,9 @@ function Text_DEPRECATED({
     type,
   ])
 
-  if (selectable && isIOS) {
-    return (
-      <UITextView {...textProps}>
-        {isIOS && emoji
-          ? renderChildrenWithEmoji(children, textProps)
-          : children}
-      </UITextView>
-    )
-  }
-
   return (
-    <RNText {...textProps}>
-      {isIOS && emoji ? renderChildrenWithEmoji(children, textProps) : children}
-    </RNText>
+    <UITextView {...textProps}>
+      {renderChildrenWithEmoji(children, textProps, emoji ?? false)}
+    </UITextView>
   )
 }