FEMT: Call /bootdata and render grafana (#105176)

* rename /mtfe route to /femt to match project name

* set correct navTree JSON property name

* call GetWebAssets in the request handler to prevent stale assets during development

* Call /bootdata and render grafana

* set nonce on script

* write csp header in index handler

* write report-only csp as well

* debug stuff

* more debug logging

* move importing app into a seperate, async-loaded module

* Clean up comments

* make /femt redirect to / in the frontend

* remove console.log

* remove stale commented code

* call __grafana_load_failed if bootstrap fails

* comment for __grafana_boot_data_promise

* remove console.log

* remove blank newline

* codeowners

pkg/api/api.go

@@ -91,7 +91,7 @@ func (hs *HTTPServer) registerRoutes() {
 		if err != nil {
 			panic(err) // ???
 		}
-		r.Get("/mtfe", index.HandleRequest)
+		r.Get("/femt", index.HandleRequest)
 
 		// Temporarily expose the full bootdata via API
 		r.Get("/bootdata", reqNoAuth, hs.GetBootdata)