Harmony v2.3.0

What's new:

feat(interactions/application_commands): add support for channelType in Option #234
feat: add devcontainer #235
feat(commands): add support for middlewares #236
feat: support multiple embeds and deprecate single embed option #238
feat(util & Client): add createOAuthURL #237
feat(CommandClient): commandNotFound event #243
feat: add slash commands decorators with type hinting #230
feat(member): Guild member avatar fetching #244
fix: eliminate lots of anys #239
cleanup(structures): remove some duplicated code #245
feat(CommandCategory): add description to CommandCategory #249
fix(message): Set channel in message constructor #250
feat(member): Add function for effective color #252
types(VoiceRegion): deprecated vip property #254
feat(application): update types and structure #255
feat: autocomplete support #261
feat(types/userFlags): add BOT_HTTP_INTERACTIONS flag #246
feat(role): Role icons #251
feat(CommandOptions): add min_value and max_value slash command options #262

Full Changelog: v2.2.0...v2.3.0