citra_qt: Add indicator in status bar

Since we do not have an overlay yet, it can be confusing whether movie is being recorded or played. This makes it clear.

Status messages (e.g. system archive missing) will be overriden, but that shouldn't be too important when recording movies.

Doubled the status bar updating frequency to provide a better experience. It now updates every second.

src/core/movie.h

@@ -123,6 +123,9 @@ public:
     bool IsPlayingInput() const;
     bool IsRecordingInput() const;
 
+    u64 GetCurrentInputIndex() const;
+    u64 GetTotalInputCount() const;
+
 private:
     static Movie s_instance;
 
@@ -159,6 +162,9 @@ private:
 
     std::vector<u8> recorded_input;
     std::size_t current_byte = 0;
+    u64 current_input = 0;
+    // Total input count of the current movie being played. Not used for recording.
+    u64 total_input = 0;
 
     u64 id = 0; // ID of the current movie loaded
     u64 init_time;