Deal with long module names in the outline sidebar

[hugobarauna]

Problem

For longer module names, the last part of the module name is not visible in the outline sidebar

For example, if the module name is Foobar. Repo.Migrations.AddPosts, the sidebar will look like this:

Here's a user facing that problem: https://x.com/cd_slash_x/status/1839961298441814510

Solution ideas

• break the module names across multiple lines. (The best idea is probably to introduce ​ or "\u200B" in Elixir after each dot using String.replace and disable the truncation with ... via CSS)
• we could show the ellipsis from the left (but that may look weird)