examples: Add example that deletes a file

examples/delete_file.zig

@@ -0,0 +1,35 @@
+const std = @import("std");
+const Io = std.Io;
+
+const Simulator = @import("zigmulator");
+
+fn deleteFileProgram(init: std.process.Init) anyerror!void {
+    const file = try Io.Dir.cwd().createFile(init.io, "temporary.txt", .{});
+    file.close(init.io);
+
+    try Io.Dir.cwd().deleteFile(init.io, "temporary.txt");
+
+    const deleted = Io.Dir.cwd().openFile(init.io, "temporary.txt", .{});
+    const message = if (deleted) |opened| message: {
+        opened.close(init.io);
+        break :message "temporary.txt still exists";
+    } else |err| switch (err) {
+        error.FileNotFound => "temporary.txt was deleted",
+        else => return err,
+    };
+
+    var stdout = Io.File.stdout().writerStreaming(init.io, &.{});
+    try stdout.interface.print("{s}\n", .{message});
+    try stdout.interface.flush();
+}
+
+pub fn main(init: std.process.Init) !void {
+    var sim: Simulator = undefined;
+    sim.init(std.heap.page_allocator, init.io);
+    defer sim.deinit();
+
+    try sim.addExecutable("delete_file", deleteFileProgram);
+    try sim.spawn("delete_file", .{});
+
+    while (sim.scheduleOne()) {}
+}