refactor: improve binding, performance, and type safety

- Implement ShouldBind with support for JSON, Form, WANF, and GOB formats
- Add ShouldBindForm, ShouldBindGOB, and helper functions for form binding
- Use fmt.Appendf instead of fmt.Sprintf for better performance
- Replace interface{} with any for modern Go style
- Use maps.Copy for cleaner header copying
- Update strings.SplitSeq to use range over strings.Seq
- Remove deprecated placeholder comments and add proper implementations
- Fix reflect.Pointer usage for Go 1.22+ compatibility

sse.go

@@ -40,8 +40,8 @@ func (e *Event) Render(w io.Writer) error {
 		buf.WriteString("\n")
 	}
 	if len(e.Data) > 0 {
-		lines := strings.Split(e.Data, "\n")
-		for _, line := range lines {
+		lines := strings.SplitSeq(e.Data, "\n")
+		for line := range lines {
 			buf.WriteString("data: ")
 			buf.WriteString(line)
 			buf.WriteString("\n")