addNamedWriteFiles

pub fn addNamedWriteFiles(b: *Build, name: []const u8) *Step.WriteFile {
    const graph = b.graph;
    const wf = Step.WriteFile.create(b);
    const gop = b.named_writefiles.getOrPutValue(
        graph.arena,
        graph.dupeString(name),
        wf,
    ) catch @panic("OOM");
    if (gop.found_existing) {
        panic(
            "A WriteFile step with the name {q} has already been added to the package. Consider creating a private WriteFile step with std.Build.addWriteFiles",
            .{name},
        );
    }
    return wf;
}