chore: move the go code into a subfolder

apps/api/internal/i18n/languages.go

@@ -0,0 +1,51 @@
+package i18n
+
+import (
+	"errors"
+	"strings"
+
+	"golang.org/x/text/language"
+)
+
+var supportedLanguages []language.Tag
+
+func SupportedLanguages() []language.Tag {
+	if supportedLanguages == nil {
+		panic("supported languages not loaded")
+	}
+	return supportedLanguages
+}
+
+func SupportLanguages(languages ...language.Tag) {
+	supportedLanguages = languages
+}
+
+func MustLoadSupportedLanguagesFromDir() {
+	var err error
+	defer func() {
+		if err != nil {
+			panic("failed to load supported languages: " + err.Error())
+		}
+	}()
+	if supportedLanguages != nil {
+		return
+	}
+	i18nDir, err := LoadFilesystem(LOGIN).Open(i18nPath)
+	if err != nil {
+		return
+	}
+	defer func() {
+		err = errors.Join(err, i18nDir.Close())
+	}()
+	files, err := i18nDir.Readdir(0)
+	if err != nil {
+		return
+	}
+	supportedLanguages = make([]language.Tag, 0, len(files))
+	for _, file := range files {
+		lang := language.Make(strings.TrimSuffix(file.Name(), ".yaml"))
+		if lang != language.Und {
+			supportedLanguages = append(supportedLanguages, lang)
+		}
+	}
+}