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/web/user/home.go

@@ -50,7 +50,7 @@ const (
 // getDashboardContextUser finds out which context user dashboard is being viewed as .
 func getDashboardContextUser(ctx *context.Context) *user_model.User {
 	ctxUser := ctx.Doer
-	orgName := ctx.Params(":org")
+	orgName := ctx.PathParam(":org")
 	if len(orgName) > 0 {
 		ctxUser = ctx.Org.Organization.AsUser()
 		ctx.Data["Teams"] = ctx.Org.Teams
@@ -714,9 +714,9 @@ func ShowGPGKeys(ctx *context.Context) {
 func UsernameSubRoute(ctx *context.Context) {
 	// WORKAROUND to support usernames with "." in it
 	// https://github.com/go-chi/chi/issues/781
-	username := ctx.Params("username")
+	username := ctx.PathParam("username")
 	reloadParam := func(suffix string) (success bool) {
-		ctx.SetParams("username", strings.TrimSuffix(username, suffix))
+		ctx.SetPathParam("username", strings.TrimSuffix(username, suffix))
 		context.UserAssignmentWeb()(ctx)
 		if ctx.Written() {
 			return false