i abstraced the file handling out to a global static struct called
"Files" that is only written to once, in main inside a OnceLock. i also
split out asset handling into its own module folder called assets which
has all the asset handling code.
i also have a new crate called "proc_macros" which provides a attribute macro
that adds the base_template field to each struct i decorate with it
using the syn and quote crates.
