fix(tvos): copy project resource dirs into the .app bundle

[proggeramlug]

Summary

bundle_for_tvos never copied the project's resource directories into the .app, so the assets/ directory (levels, sprite sheets, sounds) was absent from every tvOS bundle. The iOS, watchOS, and visionOS bundlers all call copy_bundle_resource_dirs; the tvOS path skipped it, with a comment claiming "tvOS apps consume assets via the metallib / embedded JS bundle."

That assumption is wrong for any app that reads asset files at runtime: bloom_read_file / bloom_load_texture (and equivalents) resolve relative paths against [[NSBundle mainBundle] resourcePath]. With nothing copied, every asset read failed — a platformer compiled for --target tvos-simulator booted to its title screen (procedural drawing) but loaded an empty level, because assets/levels/*.txt and assets/sprites/*.png weren't in the bundle.

Change

Add the same resource-copy block the other Apple targets use, right after stage_native_library_artifacts:

if let Some(src_dir) = input.canonicalize().ok().and_then(|p| p.parent().map(|d| d.to_path_buf())) {
    let project_root = find_project_root_for_resources(&src_dir, true);
    copy_bundle_resource_dirs(&project_root, &app_dir);
}

Validation

Rebuilt the perry binary and recompiled a Bloom Engine game for tvos-simulator. A clean build (rm -rf *.app first) now bundles assets/levels/, assets/sprites/, assets/sounds/, etc. automatically, and the game loads and renders a real level on the Apple TV simulator (previously the level was empty).