feat: allow usage of unicode emoji in PartialEmojiConverter (#2819)

* Update converter.py

* fix: enhance PartialEmojiConverter to support direct emoji names

* update doc

Author: Lumabots

discord/ext/commands/converter.py

@@ -41,6 +41,7 @@
 )
 
 import discord
+from discord.partial_emoji import EMOJIS_MAP
 
 from .errors import *
 
@@ -851,7 +852,8 @@ async def convert(self, ctx: Context, argument: str) -> discord.GuildEmoji:
 class PartialEmojiConverter(Converter[discord.PartialEmoji]):
     """Converts to a :class:`~discord.PartialEmoji`.
 
-    This is done by extracting the animated flag, name and ID from the emoji.
+    This is done by extracting the animated flag, name, and ID for custom emojis,
+    or by using the standard Unicode emojis supported by Discord.
 
     .. versionchanged:: 1.5
          Raise :exc:`.PartialEmojiConversionFailure` instead of generic :exc:`.BadArgument`
@@ -872,6 +874,14 @@ async def convert(self, ctx: Context, argument: str) -> discord.PartialEmoji:
                 id=emoji_id,
             )
 
+        if argument in EMOJIS_MAP.values():
+            return discord.PartialEmoji.with_state(
+                ctx.bot._connection,
+                animated=False,
+                name=argument,
+                id=None,
+            )
+
         raise PartialEmojiConversionFailure(argument)
 
 
@@ -1094,7 +1104,11 @@ def get_converter(param: inspect.Parameter) -> Any:
 
 
 def is_generic_type(tp: Any, *, _GenericAlias: type = _GenericAlias) -> bool:
-    return isinstance(tp, type) and issubclass(tp, Generic) or isinstance(tp, _GenericAlias)  # type: ignore
+    return (
+        isinstance(tp, type)
+        and issubclass(tp, Generic)
+        or isinstance(tp, _GenericAlias)
+    )  # type: ignore
 
 
 CONVERTER_MAPPING: dict[type[Any], Any] = {