Add russian localization (#574)

* this is test localization to russian language

i didnt translate string
  "disable_lbry": "Disable LBRY for Streaming",
because i dont fully understand what this option does. i opt-in and opt-out this option on videos that have copies on LBRY but nothing changes.

* Add russian to language selector.

Co-authored-by: FireMaskterK <20838718+FireMasterK@users.noreply.github.com>

src/components/Preferences.vue

@@ -266,6 +266,7 @@ export default {
                 { code: "ml", name: "മലയാളം" },
                 { code: "nb_NO", name: "Norwegian Bokmål" },
                 { code: "pl", name: "polski" },
+                { code: "ru", name: "русский" },
                 { code: "tr", name: "Türkçe" },
                 { code: "zh_Hant", name: "繁體中文" },
                 { code: "zh_Hans", name: "简体中文" },