Refactor names (#31405)

This PR only does "renaming":

* `Route` should be `Router` (and chi router is also called "router")
* `Params` should be `PathParam` (to distingush it from URL query param, and to match `FormString`)
* Use lower case for private functions to avoid exposing or abusing

routers/api/v1/admin/cron.go

@@ -74,7 +74,7 @@ func PostCronTask(ctx *context.APIContext) {
 	//     "$ref": "#/responses/empty"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
-	task := cron.GetTask(ctx.Params(":task"))
+	task := cron.GetTask(ctx.PathParam(":task"))
 	if task == nil {
 		ctx.NotFound()
 		return