Small fixes to the web ui

More CSS variables for more unified color use.

No pixels, just rems for better scaling.

Scroll to selected server line when using keyboard navigation.

Chronological order for web logs

Sort the web viewer logs in chronological order and follow them, but
also allow to scroll up even if logs fills up bellow. Then also show a
button to scroll back down to the bottom.

Also fix some error handling in the CLI client when the server isn't
running that was checked improperly.

Rate limit websocket

The websocket was able to send a lot of data very quickly, so here
I've added a rate limit to not overwhelm clients.

Shell completions and some integration tests

• Introduced shell completions for the fish shell and bash shell
• Introduced some very basic (not fully covered) integration tests for
  expected usage patterns to be able to catch regressions in CI.

Realer time, neater flows

• Require an environment variable to read static files from the
  filesystem rather than from the embedded resource in the binary to
  avoid accidental reads of other static resources from other projects.
• Refactor websocket to let the client subscribe to which logs to get
  rather than getting "all the logs" at "all the time".
• Refactor websocket to send data using events rather than "waiting a
  little bit and check if the data has changed".
• Tweaks to color themes.
• Tweak the manpage.
• Break the APIs :)
• Remove deprecation notice of rand usage in golang.

Initial release

Initial project release with all features that I currently feel is
required for my daily use.