There's a newer version of the font available but ligatures seem
broken googlefonts/Inconsolata#58 and googlefonts/Inconsolata#52.
As part of this commit I also upgraded rust-embed to use the new
exclusion feature, which allows us to skip embedding OS files like
`.DS_Store`.
This increases the threshold at which we start loading new messages
as well as the amount of messages we get back from the server every
time we fetch.
Also, we restructured the seed binary to use the methods in `Db` to
generate seed data and added random chat messages.
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
