fix middleware in data routers when used with createRoutesFromElements (#14357)

Author: brophdawg11

.changeset/slow-laws-do.md

@@ -0,0 +1,5 @@
+---
+"react-router": patch
+---
+
+Support `middleware` prop on `<Route>` for usage with a data router via `createRoutesFromElements`

packages/react-router/__tests__/createRoutesFromChildren-test.tsx

@@ -40,6 +40,7 @@ describe("creating routes from JSX", () => {
               "index": undefined,
               "lazy": undefined,
               "loader": undefined,
+              "middleware": undefined,
               "path": "home",
               "shouldRevalidate": undefined,
             },
@@ -60,6 +61,7 @@ describe("creating routes from JSX", () => {
               "index": undefined,
               "lazy": undefined,
               "loader": undefined,
+              "middleware": undefined,
               "path": "about",
               "shouldRevalidate": undefined,
             },
@@ -87,6 +89,7 @@ describe("creating routes from JSX", () => {
                   "index": true,
                   "lazy": undefined,
                   "loader": undefined,
+                  "middleware": undefined,
                   "path": undefined,
                   "shouldRevalidate": undefined,
                 },
@@ -107,6 +110,7 @@ describe("creating routes from JSX", () => {
                   "index": undefined,
                   "lazy": undefined,
                   "loader": undefined,
+                  "middleware": undefined,
                   "path": ":id",
                   "shouldRevalidate": undefined,
                 },
@@ -120,6 +124,7 @@ describe("creating routes from JSX", () => {
               "index": undefined,
               "lazy": undefined,
               "loader": undefined,
+              "middleware": undefined,
               "path": "users",
               "shouldRevalidate": undefined,
             },
@@ -133,6 +138,7 @@ describe("creating routes from JSX", () => {
           "index": undefined,
           "lazy": undefined,
           "loader": undefined,
+          "middleware": undefined,
           "path": "/",
           "shouldRevalidate": undefined,
         },
@@ -186,6 +192,7 @@ describe("creating routes from JSX", () => {
               "index": undefined,
               "lazy": undefined,
               "loader": [Function],
+              "middleware": undefined,
               "path": "home",
               "shouldRevalidate": [Function],
             },
@@ -213,6 +220,7 @@ describe("creating routes from JSX", () => {
                   "index": true,
                   "lazy": undefined,
                   "loader": undefined,
+                  "middleware": undefined,
                   "path": undefined,
                   "shouldRevalidate": undefined,
                 },
@@ -226,6 +234,7 @@ describe("creating routes from JSX", () => {
               "index": undefined,
               "lazy": undefined,
               "loader": undefined,
+              "middleware": undefined,
               "path": "users",
               "shouldRevalidate": undefined,
             },
@@ -241,6 +250,7 @@ describe("creating routes from JSX", () => {
           "index": undefined,
           "lazy": undefined,
           "loader": undefined,
+          "middleware": undefined,
           "path": "/",
           "shouldRevalidate": undefined,
         },