feat: Add SkipDelay to delay skipping a segment

[jvpernis]

Hi there! Thanks for this awesome project. This is actually my first encounter with SponsorBlock, and I actually like it a lot!

However, I found the sponsor segment timing to be very agressive, to the extent that I'd get thrown off guard when it skips. I don't mind watching the first few seconds of a segue, as it actually even helps me mentally prepare for the skip.

Therefore, I added the --skip-delay flag to delay skipping at the start of a segment. Let me know what you think!

[gabe565]

Thank you, this is a great idea! PR looks good, but could you update the flag documentation by running:

go run ./internal/generate/docs

Also, this doesn't block a merge, but maybe change the shell completion values to something smaller like "500ms", "1s", "2s"?

[sonarcloud[bot]]

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[jvpernis]

Done, and done!

[gabe565]

Amazing. Thank you!