Refactor: cleanup

- Introduce tracing
- Introduce cobra / viper framework
- Introduce resty client
- Seperate files in api/ and bot/
- Trim unused functions

bot/handleSlashPing.go

@@ -0,0 +1,15 @@
+package bot
+
+import "github.com/bwmarrin/discordgo"
+
+func (b *Bot) handleSlashPing(
+	s *discordgo.Session,
+	i *discordgo.InteractionCreate,
+) {
+	s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
+		Type: discordgo.InteractionResponseChannelMessageWithSource,
+		Data: &discordgo.InteractionResponseData{
+			Content: "pong",
+		},
+	})
+}