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/repo/git_ref.go

@@ -71,7 +71,7 @@ func GetGitRefs(ctx *context.APIContext) {
 	//   "404":
 	//     "$ref": "#/responses/notFound"
 
-	getGitRefsInternal(ctx, ctx.Params("*"))
+	getGitRefsInternal(ctx, ctx.PathParam("*"))
 }
 
 func getGitRefsInternal(ctx *context.APIContext, filter string) {