Modernize terminal theme and prompt

[bachand]

I am including screenshots to show the difference between the old and new Terminal.app themes. The new theme is named Balthazar 2001, and it replaces Balthazar 2000. I created the new theme from the Basic default theme. Various AI tools helped me with the colors and I also made some manual tweaks.

Balthazar 2000 and previous prompts	Balthazar 2001 and new prompt / title

Print ANSI colors script

for i in {30..37}; do
  echo -e "\e[${i}mANSI Color ${i}\e[0m"
done
for i in {90..97}; do
  echo -e "\e[${i}mANSI Bright Color ${i}\e[0m"
done

I explored adding https://monaspace.githubnext.com as my font but ultimately I found the SF monospaced font to be more readable. I can also avoid installing another dependency by using the SF builtin font.

In addition to the visual differences, the new theme no longer replaces non-ASCII input with Control-V. In this way, it's now possible to paste emoji into the shell.

I have also moved the PWD and git branch to the title bar of Terminal.app. I wanted the commands to start from the same column regardless of my PWD. I also have found that the trailing-aligned git branch can complicate copying output.

[bachand]

👋

[bachand]

I prefer an opaque background to simplify taking screenshots.