misc: Code housekeeping, file restructuring.

build.zig

@@ -67,7 +67,7 @@ pub fn build(b: *std.Build) void {
     // Creates a step for unit testing. This only builds the test executable
     // but does not run it.
     const lib_unit_tests = b.addTest(.{
-        .root_source_file = b.path("src/root.zig"),
+        .root_source_file = b.path("src/test.zig"),
         .target = target,
         .optimize = optimize,
     });