Link to source for individual days

[csmith]

In the matrix tables, it'd be nice if there could be a link to go to each person's implementation for the relevant day.

For GitHub this would mean linking to {repo}/blob/{branch}/{daypath} (will handle both directories and files).

For GitLab it apparently is exactly the same but with a random hyphen to annoy you: {repo}/-/blob/{branch}/{daypath}. Also seems to handle both directories and files as you expect.

[ShaneMcC]

For the moment, this is implemented via the healthcheck endpoint, you can click on the 🗹 icon next to a person and then expand the relevant day and find the path to inputs/code from there.