Update referral.go to check for profanity in code (#2868)

## Description
Checks if the code contains profanity

## Tests

server/go.mod

@@ -5,6 +5,7 @@ go 1.21
 require (
 	firebase.google.com/go v3.13.0+incompatible
 	github.com/GoKillers/libsodium-go v0.0.0-20171022220152-dd733721c3cb
+        github.com/TwiN/go-away v1.0.5
 	github.com/avct/uasurfer v0.0.0-20191028135549-26b5daa857f1
 	github.com/awa/go-iap v1.3.16
 	github.com/aws/aws-sdk-go v1.34.13

server/pkg/controller/storagebonus/referral.go

@@ -17,6 +17,7 @@ import (
 	enteTime "github.com/ente-io/museum/pkg/utils/time"
 	"github.com/ente-io/stacktrace"
 	"github.com/gin-gonic/gin"
+	"github.com/TwiN/go-away"
 )
 
 const (
@@ -141,6 +142,12 @@ func (c *Controller) UpdateReferralCode(ctx *gin.Context, userID int64, code str
 	if len(code) < 4 || len(code) > 20 {
 		return stacktrace.Propagate(ente.NewBadRequestWithMessage("code length should be between 4 and 8"), "")
 	}
+
+        // Check if the code contains any offensive language using the go-away library
+        if goaway.IsProfane(code) {
+        	return stacktrace.Propagate(ente.NewBadRequestWithMessage("Referral code contains offensive language and cannot be used"), "")
+        }
+
 	err := c.StorageBonus.AddNewCode(ctx, userID, code, isAdminEdit)
 	if err != nil {
 		return stacktrace.Propagate(err, "failed to update referral code")