Investigate manual / alternative plugin installation

[eieioxyz]

We're using Antibody, but this plugin mentions a manual option.

[eieioxyz]

Another mention of manual installation.

[eieioxyz]

This one lists Homebrew first, and doesn't explicitly show a manual variation.

[eieioxyz]

This one dissuades us from using a plugin manager.

The zsh-syntax-highlighting authors recommend manual installation over the use of a framework or plugin manager.

[eieioxyz]

And another, though this one isn't under the zsh-users organization.

[eieioxyz]

The plugin is "standalone", which means that only sourcing it is needed. So to install, unpack history-search-multi-word somewhere and add

source {where-hsmw-is}/history-search-multi-word.plugin.zsh

to zshrc.

[eieioxyz]

Let's explore zinit.

[eieioxyz]

Spaceship Prompt has longer manual instructions than other plugins.

It can also be installed with npm, so we could put it in setup-node.zsh with other global installs.

[eieioxyz]

While not technically a plugin, Improved Nano Syntax Highlighting Files could be installed in similar fashion.

Look into this instead of, or in addition to, c107ed4.