feat(reporting): bill of materials (#275)

* new reporting service

* API route

* code gen

* get tsv export from tools page

* fix naming

backend/app/api/handlers/v1/v1_ctrl_reporting.go

@@ -0,0 +1,32 @@
+package v1
+
+import (
+	"net/http"
+
+	"github.com/hay-kot/homebox/backend/internal/core/services"
+	"github.com/hay-kot/homebox/backend/pkgs/server"
+)
+
+// HandleBillOfMaterialsExport godoc
+//
+//	@Summary  Generates a Bill of Materials CSV
+//	@Tags     Reporting
+//	@Produce  json
+//	@Success 200 {string} string "text/csv"
+//	@Router   /v1/reporting/bill-of-materials [GET]
+//	@Security Bearer
+func (ctrl *V1Controller) HandleBillOfMaterialsExport() server.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) error {
+		actor := services.UseUserCtx(r.Context())
+
+		csv, err := ctrl.svc.Reporting.BillOfMaterialsTSV(r.Context(), actor.GroupID)
+		if err != nil {
+			return err
+		}
+
+		w.Header().Set("Content-Type", "text/csv")
+		w.Header().Set("Content-Disposition", "attachment; filename=bom.csv")
+		_, err = w.Write(csv)
+		return err
+	}
+}