Update emoji dataset with skin tone variants (#11678) (#11763)

* Update emoji dataset with skin tone variants

Since the format of emoji that support skin tone modifiers is predictable we can add different variants into our dataset when generating it so that we can match and properly style most skin tone variants of emoji. No real code change here other than what generates the dataset and the data itself.

* use escape unicode sequence in map

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

modules/emoji/emoji.go

@@ -9,7 +9,6 @@ import (
 	"sort"
 	"strings"
 	"sync"
-	"unicode/utf8"
 )
 
 // Gemoji is a set of emoji data.
@@ -21,6 +20,7 @@ type Emoji struct {
 	Description    string
 	Aliases        []string
 	UnicodeVersion string
+	SkinTones      bool
 }
 
 var (
@@ -131,11 +131,12 @@ func ReplaceAliases(s string) string {
 func FindEmojiSubmatchIndex(s string) []int {
 	loadMap()
 
-	// if rune and string length are the same then no emoji will be present
-	// similar performance when there is unicode present but almost 200% faster when not
-	if utf8.RuneCountInString(s) == len(s) {
+	//see if there are any emoji in string before looking for position of specific ones
+	//no performance difference when there is a match but 10x faster when there are not
+	if s == ReplaceCodes(s) {
 		return nil
 	}
+
 	for j := range GemojiData {
 		i := strings.Index(s, GemojiData[j].Emoji)
 		if i != -1 {