feat: initial project setup — Vision Studio bot

- Python 3.12 + discord.py
- Docker + docker-compose
- Forgejo Actions CI (lint + test)
- Cog system with /hello example
- deploy.sh for auto-deployment

commandes/hello.py

@@ -0,0 +1,22 @@
+import discord
+from discord import app_commands
+from discord.ext import commands
+
+
+class Hello(commands.Cog):
+    def __init__(self, bot: commands.Bot):
+        self.bot = bot
+
+    @app_commands.command(name="hello", description="Salut de la part de Vision Studio !")
+    async def hello(self, interaction: discord.Interaction):
+        embed = discord.Embed(
+            title="Vision Studio",
+            description="Salut ! Je suis **Vision Studio**, ton bot Discord.\n\nUtilise `/help` pour voir les commandes disponibles.",
+            color=discord.Color.blue(),
+        )
+        embed.set_footer(text="Vision Studio v1.0")
+        await interaction.response.send_message(embed=embed)
+
+
+async def setup(bot: commands.Bot):
+    await bot.add_cog(Hello(bot))