Initial library structure, build system and packet implementation

build.zig

@@ -0,0 +1,36 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    // Create library
+    const reticulumzero = b.addLibrary(.{
+        .name = "reticulum-zero",
+        .linkage = .static,
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("src/root.zig"),
+            .target = target,
+            .optimize = optimize,
+        }),
+    });
+
+    // Output library object
+    b.installArtifact(reticulumzero);
+
+    // Expose library as a module
+    try b.modules.put(b.dupe("reticulum-zero"), reticulumzero.root_module);
+
+    // Set up unit testing
+    const unit_tests = b.addTest(.{
+        .root_source_file = b.path("src/root.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const run_unit_tests = b.addRunStep(unit_tests);
+
+    // `zig build test` command
+    const test_step = b.step("test", "Run library unit tests");
+    test_step.dependency(&run_unit_tests.step);
+}