create a proper title page for the book

[nickreich]

I suggest creating a more proper title/intro page for the book. Right now when you load the index page for the book, it shows you the quickstart. But there is nothing that provides a first-time reader with more general quickly digested overview information. I suggest adding things like:

• the name of the package
• 1-2 sentences about basic functionality/aims/goals
• a link to the quickstart for those who don't want the overview :-)
• maybe that nice mlr3verse image?
• maybe a list of authors or a team name, with a link to a site with more information about who is creating this
• information about versioning and/or licensing of the mlr3 package itself and content within the book.
• Links to other resources, e.g. the CRAN mlr3 site, other mlr3 sites, mlr3 github site, mlr3book github site, etc...

I think the Stan reference manual has a nice front page that captures some of this. https://mc-stan.org/docs/2_22/reference-manual/index.html

If you all think this is a good idea, I could take a pass at trying to draft this.

[pat-s]

@nickreich Are you still interested in drafting a title page?

[nickreich]

Interested yes, but no time anymore due to corona modeling commitments in the US.

[RaphaelS1]

Closing as this will become title page of the published book (other parts about links I agree with and adding to another issue)