rewrote config file path search (#219)

added comment to clarify coding choices

added package xdg to vendor folder

rewrote config file path search

Co-authored-by: crapStone <crapstone01@gmail.com>
Reviewed-on: https://gitea.com/gitea/tea/pulls/219
Reviewed-by: 6543 <6543@noreply.gitea.io>
Reviewed-by: Norwin <noerw@noreply.gitea.io>

vendor/github.com/adrg/xdg/user_dirs.go

@@ -0,0 +1,40 @@
+package xdg
+
+// XDG user directories environment variables.
+var (
+	envDesktopDir     = "XDG_DESKTOP_DIR"
+	envDownloadDir    = "XDG_DOWNLOAD_DIR"
+	envDocumentsDir   = "XDG_DOCUMENTS_DIR"
+	envMusicDir       = "XDG_MUSIC_DIR"
+	envPicturesDir    = "XDG_PICTURES_DIR"
+	envVideosDir      = "XDG_VIDEOS_DIR"
+	envTemplatesDir   = "XDG_TEMPLATES_DIR"
+	envPublicShareDir = "XDG_PUBLICSHARE_DIR"
+)
+
+// UserDirectories defines the locations of well known user directories.
+type UserDirectories struct {
+	// Desktop defines the location of the user's desktop directory.
+	Desktop string
+
+	// Download defines a suitable location for user downloaded files.
+	Download string
+
+	// Documents defines a suitable location for user document files.
+	Documents string
+
+	// Music defines a suitable location for user audio files.
+	Music string
+
+	// Pictures defines a suitable location for user image files.
+	Pictures string
+
+	// VideosDir defines a suitable location for user video files.
+	Videos string
+
+	// Templates defines a suitable location for user template files.
+	Templates string
+
+	// PublicShare defines a suitable location for user shared files.
+	PublicShare string
+}