feat: site languages, setup and site URL settings

internal/domain/site/siteDomain.go

@@ -20,6 +20,13 @@ var (
 	ErrInvalidReassign = errors.New("invalid reassign destination")
 
 	ErrInvalidTitleTemplate = errors.New("the title template must contain %title%")
+
+	ErrInvalidPublicURLPattern = errors.New("invalid public url pattern")
+	ErrPublicURLScheme         = errors.New("the public url pattern must start with https:// or http://")
+	ErrPublicURLHost           = errors.New("the public url pattern must have a host")
+	ErrPublicURLPlaceholder    = errors.New("the public url pattern has an unknown placeholder")
+	ErrPublicURLNotEncoded     = errors.New("the public url pattern has characters that need encoding")
+	ErrPublicURLMissingSlug    = errors.New("the public url pattern must contain {slug}")
 )
 
 const (
@@ -60,6 +67,7 @@ type Site struct {
 	SiteName             string  `json:"site_name"`
 	TitleTemplate        string  `json:"title_template"`
 	DefaultDescription   string  `json:"default_description"`
+	PublicURLPattern     *string `json:"public_url_pattern"`
 }
 
 type Nullable[T any] struct {
@@ -78,6 +86,7 @@ type Patch struct {
 	SiteName             *string
 	TitleTemplate        *string
 	DefaultDescription   *string
+	PublicURLPattern     Nullable[string]
 }
 
 func IsValidKey(key string) bool {