feat: use tailwind css

pkg/invoice/report/qrbill/html.go

@@ -16,19 +16,12 @@ var scissors template.HTML
 //go:embed assets/template.html
 var htmlTemplate string
 
-//go:embed assets/style.css
-var style template.CSS
-
 type tmpler struct {
 	Invoice
 	Cross    template.HTML
 	Scissors template.HTML
 }
 
-func (i Invoice) CSS() template.CSS {
-	return style
-}
-
 func (i Invoice) HTML() (html template.HTML, err error) {
 	tmpl := template.Must(template.New("invoice").Parse(htmlTemplate))