Support for different timestamp formats

Bugs
1

English youtube transcripts format subtitles with colons. “13:43”
Indonesian youtube transcripts format subtitles with full stops. “13.43”

When I feed Indonesian youtube transcripts into readlang for sync timings, it does not accept them.
Minor issue, I just had to switch my youtube language back to english.

2

Just a little tip: You can use websites like regex101 to quickly fix minor annoyances like that.