Rework the installer to use `esbuild` and `tailwind`

[goncalotomas]

The current installer ships with a very rough first template that we need to rework. The new version will include a landing page, a global data folder, and will bundle properly configured tailwind and esbuild packages.

Since this change will only impact new projects generated by the framework, this doesn't necessarily need to be released with 0.3.0

[maikelthedev]

Is any of this going to be done in 2025?

[goncalotomas]

My attention and free time have been elsewhere lately. I'm seeing some "traction" on the repo which means this could be useful to someone else, so I'll spend more time on Griffin... but this particular feature would need to come after completing the Plugins / Collections feature.

If this is something you'd like to help with, I'd love to work with you on this!