some restructuring due to the recent changes to usingnamespace.
also cleaned up some deprecated stuff from raylib 3.7.
- appended the contents of raylib-wa.zig into raylib-zig.zig
- using raylib functions requires `const rl = @import("raylib");`
(and accesing the identifiers inside rl, like `rl.InitWindow`)
only the basic_window example was updated, and it looks like it crashes
on keyboard inputs.
many thanks to @nektro :)
This had a few things missing/commented, but after fixing the load paths
and uncommenting code, it seems to work fine for me.
I also ran `zig format` on the example, I can submit a PR without that
if it isn't ideal.
