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/private/manager.go

@@ -88,8 +88,8 @@ func SetLogSQL(ctx *context.PrivateContext) {
 
 // RemoveLogger removes a logger
 func RemoveLogger(ctx *context.PrivateContext) {
-	logger := ctx.Params("logger")
-	writer := ctx.Params("writer")
+	logger := ctx.PathParam("logger")
+	writer := ctx.PathParam("writer")
 	err := log.GetManager().GetLogger(logger).RemoveWriter(writer)
 	if err != nil {
 		ctx.JSON(http.StatusInternalServerError, private.Response{