Adds an additional input files that, when modified, indicates that this Run step should be re-executed. If the Run step is determined to have side-effects, the Run step is always executed when it appears in the build graph, regardless of whether this file has been modified.
pub fn addFileInput(run: *Run, file_input: std.Build.LazyPath) void
pub fn addFileInput(run: *Run, file_input: std.Build.LazyPath) void {
const graph = run.step.owner.graph;
const arena = graph.arena;
file_input.addStepDependencies(&run.step);
run.file_inputs.append(arena, file_input.dupe(graph)) catch @panic("OOM");
}