Help: Add home page to Positron Help

[petetronic]

RStudio Help has a landing page that links to various IDE and language guides. Positron Help should have a "home page" that directs people to similar useful content.

[hturner]

A feature I miss from RStudio is being able to click on a package name in the Packages tab to go to the package index. I have been working around this by typing package:: in the console, clicking any function name to open the help page, then clicking the index link at the bottom of the page.

I just realised another workaround is to run help.start(), then click on Packages to get to the list of packages, which is similar to the Packages tab in RStudio. So my issue could be solved by adding a home page as suggested here, as long as one of the links was to the list of packages!

I guess the home page might adapt to whichever language is being used in the console?

[juliasilge]

The particular use case that you are articulating @hturner is also captured in #1369 (comment).