Explore ways to keep *.tools.js files in sync with *.js in views folder

[dariocravero]

@alex-vladut brought it up in #236 that it's easy to miss updating files that have a tools specific version, like
views/Data.js and views/Data.tools.js. They used to be the same file but I found it made it harder to reason about what was actually the final content for them.

This issue is here to explore some ways in which we could make it easier for us to keep them in sync.

I suggested two approaches:

• a commit hook/github action that asks if you only change one, or
• use markers in one file and treat it as a template where we strip thing out based off that marker.