Initial QSfera import

Server/services/collaboration/pkg/middleware/claims.go

@@ -0,0 +1,9 @@
+package middleware
+
+import "github.com/golang-jwt/jwt/v5"
+
+// Claims contains the jwt registered claims plus the used WOPI context
+type Claims struct {
+	WopiContext WopiContext `json:"WopiContext"`
+	jwt.RegisteredClaims
+}