Add link to package repo on wally website

[mxruben]

Currently, when browsing packages on the wally website, you are given very minimal information about packages. One key piece of information that is missing is a link to the repo of the package you are viewing. This is very useful for quickly getting to the package's documentation, reporting bugs, etc. Right now, I have to either manually google the repo's name and author to find the repo or sometimes replacing wally.run/package/ with github.com works to get to the repo. This is bad user experience.