feat(p/ufmt): add ufmt.Errorf

[notJoon]

Description

Added the Errorf function to ufmt based on ufmt.Sprintf.

Previously, formatting errors involved a method like using errors.New(ufmt.Sprintf(XXX)), but this approach is not only cumbersome but also, as using Errorf is recommended in Go, I have newly incorporated it.

Usage

Simple Error

This example demonstrates the process of using Errorf to format and print error messages.

package main

import (
	"gno.land/p/demo/ufmt"
)

func foo() error {
	return fmt.Errorf("an error occurred in simpleFunction")
}

func main() {
	if err := foo(); err != nil {
             println("Error:", err)
	}
}

With Panic

Using panic is the recommended practice in effective gno, In this example, format the error and then output the error message with panic.

package main

import (
	"gno.land/p/demo/ufmt"
)


func foo() {
	msg := ufmt.Errorf("error: %s", "something went wrong")
	panic(msg)
}

[leohhhn]

Looks good! Thanks 🙏

Please just fix the red CI :)