add SetFooterIconf, SetImagef, SetThumbnailf and SetURLf (#204)

* add SetFooterIconf, SetImagef, SetThumbnailf and SetURLf

* Update embed_builder.go

discord/embed_builder.go

@@ -34,8 +34,7 @@ func (b *EmbedBuilder) SetDescription(description string) *EmbedBuilder {
 
 // SetDescriptionf sets the description of the EmbedBuilder with format
 func (b *EmbedBuilder) SetDescriptionf(description string, a ...any) *EmbedBuilder {
-	b.Description = fmt.Sprintf(description, a...)
-	return b
+	return b.SetDescription(fmt.Sprintf(description, a...))
 }
 
 // SetEmbedAuthor sets the author of the EmbedBuilder using an EmbedAuthor struct
@@ -64,6 +63,11 @@ func (b *EmbedBuilder) SetAuthorName(name string) *EmbedBuilder {
 	return b
 }
 
+// SetAuthorNamef sets the author name of the EmbedBuilder with format
+func (b *EmbedBuilder) SetAuthorNamef(name string, a ...any) *EmbedBuilder {
+	return b.SetAuthorName(fmt.Sprintf(name, a...))
+}
+
 // SetAuthorURL sets the author URL of the EmbedBuilder
 func (b *EmbedBuilder) SetAuthorURL(url string) *EmbedBuilder {
 	if b.Author == nil {
@@ -73,6 +77,11 @@ func (b *EmbedBuilder) SetAuthorURL(url string) *EmbedBuilder {
 	return b
 }
 
+// SetAuthorURLf sets the author URL of the EmbedBuilder with format
+func (b *EmbedBuilder) SetAuthorURLf(url string, a ...any) *EmbedBuilder {
+	return b.SetAuthorURL(fmt.Sprintf(url, a...))
+}
+
 // SetAuthorIcon sets the author icon of the EmbedBuilder
 func (b *EmbedBuilder) SetAuthorIcon(iconURL string) *EmbedBuilder {
 	if b.Author == nil {
@@ -82,6 +91,11 @@ func (b *EmbedBuilder) SetAuthorIcon(iconURL string) *EmbedBuilder {
 	return b
 }
 
+// SetAuthorIconf sets the author icon of the EmbedBuilder with format
+func (b *EmbedBuilder) SetAuthorIconf(iconURL string, a ...any) *EmbedBuilder {
+	return b.SetAuthorIcon(fmt.Sprintf(iconURL, a...))
+}
+
 // SetColor sets the color of the EmbedBuilder
 func (b *EmbedBuilder) SetColor(color int) *EmbedBuilder {
 	b.Color = color
@@ -113,6 +127,11 @@ func (b *EmbedBuilder) SetFooterText(text string) *EmbedBuilder {
 	return b
 }
 
+// SetFooterText sets the footer text of the EmbedBuilder with format
+func (b *EmbedBuilder) SetFooterTextf(text string, a ...any) *EmbedBuilder {
+	return b.SetFooterText(fmt.Sprintf(text, a...))
+}
+
 // SetFooterIcon sets the footer icon of the EmbedBuilder
 func (b *EmbedBuilder) SetFooterIcon(iconURL string) *EmbedBuilder {
 	if b.Footer == nil {
@@ -122,6 +141,11 @@ func (b *EmbedBuilder) SetFooterIcon(iconURL string) *EmbedBuilder {
 	return b
 }
 
+// SetFooterIconf sets the footer icon of the EmbedBuilder
+func (b *EmbedBuilder) SetFooterIconf(iconURL string, a ...any) *EmbedBuilder {
+	return b.SetFooterIcon(fmt.Sprintf(iconURL, a...))
+}
+
 // SetImage sets the image of the EmbedBuilder
 func (b *EmbedBuilder) SetImage(url string) *EmbedBuilder {
 	if b.Image == nil {
@@ -131,6 +155,11 @@ func (b *EmbedBuilder) SetImage(url string) *EmbedBuilder {
 	return b
 }
 
+// SetImagef sets the image of the EmbedBuilder with format
+func (b *EmbedBuilder) SetImagef(url string, a ...any) *EmbedBuilder {
+	return b.SetImage(fmt.Sprintf(url, a...))
+}
+
 // SetThumbnail sets the thumbnail of the EmbedBuilder
 func (b *EmbedBuilder) SetThumbnail(url string) *EmbedBuilder {
 	if b.Thumbnail == nil {
@@ -140,12 +169,22 @@ func (b *EmbedBuilder) SetThumbnail(url string) *EmbedBuilder {
 	return b
 }
 
+// SetThumbnailf sets the thumbnail of the EmbedBuilder with format
+func (b *EmbedBuilder) SetThumbnailf(url string, a ...any) *EmbedBuilder {
+	return b.SetThumbnail(fmt.Sprintf(url, a...))
+}
+
 // SetURL sets the URL of the EmbedBuilder
 func (b *EmbedBuilder) SetURL(url string) *EmbedBuilder {
 	b.URL = url
 	return b
 }
 
+// SetURLf sets the URL of the EmbedBuilder with format
+func (b *EmbedBuilder) SetURLf(url string, a ...any) *EmbedBuilder {
+	return b.SetURL(fmt.Sprintf(url, a...))
+}
+
 // SetTimestamp sets the timestamp of the EmbedBuilder
 func (b *EmbedBuilder) SetTimestamp(time time.Time) *EmbedBuilder {
 	b.Timestamp = &time