make error printing look nicer

cmd/tmplr/main.go

@@ -1,12 +1,18 @@
 package main
 
 import (
+	"fmt"
+
 	"github.com/atomicptr/tmplr/pkg/cli"
+	"github.com/charmbracelet/lipgloss"
 )
 
 func main() {
 	err := cli.Run()
 	if err != nil {
-		panic(err)
+		style := lipgloss.NewStyle().
+			Bold(true).
+			Foreground(lipgloss.Color("#FF0000"))
+		fmt.Println(style.Render("[ERROR]"), err)
 	}
 }

pkg/cli/cli.go

@@ -55,7 +55,12 @@ func Run() error {
 			if err != nil {
 				return err
 			}
-			f.Close()
+			defer (func() {
+				err := f.Close()
+				if err != nil {
+					panic(err)
+				}
+			})()
 			continue
 		}