feat(i18n): localize hardcoded UI strings and fix misspelled keys

Move remaining hardcoded English strings (player menus, technical-info
overlay, music/now-playing, live TV, TV search badges, MPV subtitle
settings, accessibility labels, not-found screen, session picker) to
en.json, and correct misspelled keys (occured -> occurred, autorized ->
authorized, liraries -> libraries, jellyseer -> jellyseerr) along with
their usages.

components/video-player/controls/BottomControls.tsx

@@ -183,7 +183,7 @@ export const BottomControls: FC<BottomControlsProps> = ({
           <SkipButton
             showButton={showSkipButton}
             onPress={skipIntro}
-            buttonText='Skip Intro'
+            buttonText={t("player.skip_intro")}
           />
           {/* Smart Skip Credits behavior:
               - Show "Skip Credits" if there's content after credits OR no next episode
@@ -193,7 +193,7 @@ export const BottomControls: FC<BottomControlsProps> = ({
               showSkipCreditButton && (hasContentAfterCredits || !nextItem)
             }
             onPress={skipCredit}
-            buttonText='Skip Credits'
+            buttonText={t("player.skip_credits")}
           />
           {settings.autoPlayNextEpisode !== false &&
             (settings.maxAutoPlayEpisodeCount.value === -1 ||