Add support for Apple TV Plus subtitles

[rDamascena]

Opening and closing italics markup tags in the Apple TV Plus has its own syntax.

Example:

53
00:06:35.187 --> 00:06:38.982 align:middle line:85%,start position:50%,middle
Ereção <c.styledotitalic>post mortem</c> não é incomum
após uma morte violenta.

<c.styledotitalic> represents <i> and </c> represents </i>

The rowset containing this combination is not removed:

​ZWSP
WEBVTT
X-TIMESTAMP-MAP=MPEGTS:900000,LOCAL:00:00:00.000

Here are the subtitle ripped directly from Apple TV Plus and the post-conversion and formatting version:

playlist_2023-12-22_17-50-10.pt-BR.zip