test: add sample ASS subtitle files for subtitle generation and styling tests.

ffmpeg-service/test2.ass

@@ -0,0 +1,13 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 1080
+PlayResY: 1920
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Sans,65,&H00FFFFFF,&H000000FF,&H00000000,&H80000000,-1,0,0,0,100,100,0,0,1,4,2,5,50,50,0,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:02.00,0:00:04.00,Default,,0,0,0,,Hello World