Add language support for en, de, es, fr, hi, pt, it, ja, ru, zh and more

[Fintasys]

closes: #203

Description

• Generate Emoji-Set locale files from official Unicode-Org descriptions at
  https://github.com/unicode-org/cldr/blob/main/common/annotations
• Add emoji set language files for en, de, es, fr, hi, pt, it, ja, ru, zh
• Update to 4.0 due to breaking changes, update ReadMe and ChangeLog

Usage

EmojiPicker(
         textEditingController: _controller,
         scrollController: _scrollController,
         config: Config(
             emojiSet: _getEmojiLocale,
        ),
)

List<CategoryEmoji> _getEmojiLocale(Locale locale) {
  switch (locale.languageCode) {
    case "ja":
      return emojiSetJapanese;
    case "de":
      return emojiSetGerman;
    default:
      return emojiSetEnglish;
  }
}

[emavgl]

About the usage: wouldn't be possible to pass just the Locale object and the library behind the hood fetch the correct set?

[Fintasys]

@emavgl It's possible but it would remove the possibility to users to add other languages by their own

[emavgl]

EmojiPicker(
textEditingController: _controller,
scrollController: _scrollController,
config: Config(
emojiSet: _getEmojiLocale(locale),
),
)

I would still keep emojiSet so if the user wants to do some change, they are free to implement _getEmojiLocale(locale) or similar as they want to, in their app.

While in the library you already have the map Locale -> EmojiSet and you can easily achive something like

   config: Config(
       locale: userLocale;
  ),

Where userLocale is an https://api.flutter.dev/flutter/dart-ui/Locale-class.html

[Fintasys]

@emavgl Ah I get it. That's of course also a possibility, thx! I will think about it and make further changes once I got time 🙏

[emavgl]

Sure, thank you so much for your work!