feat: add hostname info

src/macos/macos.zig

@@ -4,3 +4,12 @@ pub fn getUsername(allocator: std.mem.Allocator) ![]u8 {
     const username = try std.process.getEnvVarOwned(allocator, "USER");
     return username;
 }
+
+pub fn getHostname(allocator: std.mem.Allocator) ![]u8 {
+    var buf: [std.posix.HOST_NAME_MAX]u8 = undefined;
+    const hostnameEnv = try std.posix.gethostname(&buf);
+
+    const hostname = try allocator.dupe(u8, hostnameEnv);
+
+    return hostname;
+}