feat: [FC-0070] Remove backend redirects (use SPA functionality) (#1372)

Introduces the ability to utilize SPA functionality when the relevant waffle flags are enabled for current MFE pages. When any new MFE page is loaded, a request is made to retrieve the waffle flags. This includes both global waffle flags related to MFE Authoring pages, as well as waffle flags specific to the current course.

package-lock.json

@@ -21,7 +21,7 @@
         "@edx/brand": "npm:@openedx/brand-openedx@^1.2.3",
         "@edx/browserslist-config": "1.2.0",
         "@edx/frontend-component-footer": "^14.1.0",
-        "@edx/frontend-component-header": "^5.6.0",
+        "@edx/frontend-component-header": "^5.7.0",
         "@edx/frontend-enterprise-hotjar": "^2.0.0",
         "@edx/frontend-platform": "^8.0.3",
         "@edx/openedx-atlas": "^0.6.0",
@@ -2176,9 +2176,9 @@
       }
     },
     "node_modules/@edx/frontend-component-header": {
-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/@edx/frontend-component-header/-/frontend-component-header-5.6.0.tgz",
-      "integrity": "sha512-ITLLrej6BbWVc/0baMkKg/ACTvUGSR188Rn/BC2Y82Tdu8gRsZB6+0GUsDX/6FJjeIazLXdUusKlfwVU90sXLA==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@edx/frontend-component-header/-/frontend-component-header-5.7.0.tgz",
+      "integrity": "sha512-a7ErsU0m6yaU8VGLN4JYC1Y43W5L/zSCZSmpDZw534LiPK43k4eyU8u5Ep1yxp+8sOvB49qED4huIq+1oVDJsA==",
       "dependencies": {
         "@fortawesome/fontawesome-svg-core": "6.6.0",
         "@fortawesome/free-brands-svg-icons": "6.6.0",
@@ -2198,7 +2198,8 @@
         "@openedx/paragon": ">= 21.5.7 < 23.0.0",
         "prop-types": "^15.5.10",
         "react": "^16.9.0 || ^17.0.0",
-        "react-dom": "^16.9.0 || ^17.0.0"
+        "react-dom": "^16.9.0 || ^17.0.0",
+        "react-router-dom": "^6.14.2"
       }
     },
     "node_modules/@edx/frontend-component-header/node_modules/react-responsive": {