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/email.go

@@ -38,7 +38,7 @@ func GetAllEmails(ctx *context.APIContext) {
 	listOptions := utils.GetListOptions(ctx)
 
 	emails, maxResults, err := user_model.SearchEmails(ctx, &user_model.SearchEmailOptions{
-		Keyword:     ctx.Params(":email"),
+		Keyword:     ctx.PathParam(":email"),
 		ListOptions: listOptions,
 	})
 	if err != nil {
@@ -82,6 +82,6 @@ func SearchEmail(ctx *context.APIContext) {
 	//   "403":
 	//     "$ref": "#/responses/forbidden"
 
-	ctx.SetParams(":email", ctx.FormTrim("q"))
+	ctx.SetPathParam(":email", ctx.FormTrim("q"))
 	GetAllEmails(ctx)
 }