style: edit package comments (#41)

Author: mojixcoder

errors/errors.go

@@ -1,4 +1,5 @@
 // Package errors implements error interface.
+//
 // HTTPError has first class support in Kid and is used for returning proper responses when an error happens.
 package errors
 
@@ -38,7 +39,7 @@ func (e *HTTPError) WithError(err error) *HTTPError {
 	return e
 }
 
-// WithMessage sets a new message for the error.
+// WithMessage sets the error message.
 //
 // This message will be sent in response in Kid's default error handler. So it should of a type which can be converted to JSON.
 func (e *HTTPError) WithMessage(message any) *HTTPError {

html_renderer/html.go

@@ -1,3 +1,4 @@
+// Package htmlrenderer provides an interface and its implementations for rendering HTML pages.
 package htmlrenderer
 
 import (

serializer/serializer.go

@@ -1,3 +1,7 @@
+// Package serializer provides an interface to read from request body or write to response body.
+// Can be used for reading/writing JSON, XML, MessagePack, etc.
+//
+// Currently the supported ones are JSON and XML.
 package serializer
 
 import (