Initial TigerBeetle specifics strip. All 7 tests passing.

build.zig

@@ -0,0 +1,18 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    _ = b.addModule("io", .{ .source_file = .{ .path = "src/io.zig" } });
+
+    const main_tests = b.addTest(.{
+        .root_source_file = .{ .path = "src/test.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const run_main_tests = b.addRunArtifact(main_tests);
+    const test_step = b.step("test", "Run library tests");
+    test_step.dependOn(&run_main_tests.step);
+}