fix: attribute error in command serialization

[Mihitoko]

Summary

When Serializing commands which have a Annotated annotation it comes to a AttributeError because the type information is not wrapped in SlashCommand type.

Information

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed).
• This PR is not a code change (e.g. documentation, README, typehinting,
  examples, ...).

Checklist

• I have searched the open pull requests for duplicates.
• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why.
• I have updated the changelog to include these changes.

[Mihitoko]

This PR will close #2223

[Mihitoko]

Sorry did not notice the comments,
Ill resolve the merge conflict later.
When im back from work

[Dorukyum]

I've solved the merge conflict and will approve after testing.

[Mihitoko]

I've solved the merge conflict and will approve after testing.

Thank you

[plun1331]

Tested with following:

import typing
import discord
from discord.ext import commands

bot = commands.Bot()

@bot.slash_command(options=[discord.Option(int, name="my-option", description="This is my option!")])
async def my_command1(ctx: discord.ApplicationContext, my_option: int):
    await ctx.respond("Hey, %d is my option!" % my_option)

@bot.slash_command()
async def my_command2(ctx: discord.ApplicationContext, my_option: discord.Option(int, name="my-option", description="This is my option!")):
    await ctx.respond("Hey, %d is my option!" % my_option)

@bot.slash_command()
async def my_command3(ctx: discord.ApplicationContext, my_option: typing.Annotated[int, discord.Option(int, name="my-option", description="This is my option!")]):
    await ctx.respond("Hey, %d is my option!" % my_option)

print(my_command1.to_dict())
print(my_command2.to_dict())
print(my_command3.to_dict())

Resolved