chore: migrate services to integration folder

.github/CONTRIBUTING.md

@@ -211,7 +211,7 @@ pnpm dev:docs
 A Postgres database is required.
 
 ```shell
-cd services/telegram-bot
+cd integrations/telegram-bot
 docker compose up -d
 ```
 
@@ -247,7 +247,7 @@ pnpm -F @proj-airi/telegram-bot start
 ### Discord bot integration
 
 ```shell
-cd services/discord-bot
+cd integrations/discord-bot
 ```
 
 Configure `.env`
@@ -275,7 +275,7 @@ pnpm -F @proj-airi/discord-bot start
 ### Minecraft agent
 
 ```shell
-cd services/minecraft
+cd integrations/minecraft
 ```
 
 Start a Minecraft client, export your world with desired port, and fill-in the port number in `.env.local`.