Allow ReactPy to compile to raw HTML (flatpage)

[Archmonger]

Current Situation

Now that we've merged in fully functional client side components, it is now technologically possible for ReactPy to be compiled into flatpage(s).

Proposed Actions

Create some sort of reactpy CLI compiler (or maybe a Bun extension?) that allows ReactPy to be compiled down into flatpage(s).

For example, a CLI command might looks like this:

reactpy flatpages "glob_pattern/to/my_*.html" --outdir "dist/"

We should also have a Python API equivalent for people wanting to script this behavior. It might look like this:

from reactpy.pyscript import compile_flatpages

compile_flatpages("glob_pattern/to/my_*.html", outdir="dist/")