Add info on skip feature to Intro and Tutorial

[thorstenMueller]

Description

In PR #52 i've added a feature to skip a phrase from the corpus. This PR adds the info on that feature to the docs shown in frontend.

Type of PR

• Bugfix
• Feature implementation
• Refactor of code (without functional changes)
• Documentation improvements
• Test improvements

Testing

Check "S" hint before recording start.

[thorstenMueller]

Hi @krisgesling 👋 .
Do you think you can find some time to review/merge the PR during this week? But I don't want to rush you.

[krisgesling]

Looks great, thanks.

The only thing I wanted to check is whether the SVG has any licensing or attribution requirements attached to it?

A minor thing I know, but also silly for us to ignore it and get burnt by something so small.

[thorstenMueller]

Looks great, thanks.

The only thing I wanted to check is whether the SVG has any licensing or attribution requirements attached to it?

A minor thing I know, but also silly for us to ignore it and get burnt by something so small.

Good point @krisgesling. I created the svg myself using Inkscape and the existing "P" svg as template. So there shouldn't be any licensing trouble.