Localize Email Templates

[6543]

at the moment email templates are not really localized, change this!

Gitea version 1.14.0+dev-880-gb3056a026

[zeripath]

gitea/services/mailer/mail.go

Lines 227 to 232 in 3d8b5ad

	var mailSubject bytes.Buffer
	if err := subjectTemplates.ExecuteTemplate(&mailSubject, string(tplName), mailMeta); err == nil {
	subject = sanitizeSubject(mailSubject.String())
	} else {
	log.Error("ExecuteTemplate [%s]: %v", string(tplName)+"/subject", err)
	}

[6543]

refactor to: pass users into func -> group them by lang -> render for each lang -> send chuncks independent ...

[6543]

Current state: all done beside replace strings in themplate with one in locale files by using Tr help function