feature: zentropy-client module

[mrtowers]

created a client module that adds connecting capabilities for the users of Zig.

const zentropy = b.dependency("zentropy", .{ .target = target, .optimize = optimize });
exe.root_module.addImport(zentropy.module("zentropy");

Usage:

const zentropy = @import("zentropy");

pub fn main() !void {
  var client = zentropy.Client.connect(.{});
  defer client.deinit();

  try client.set("key1", "value1");
  ...
}

[mailmug]

Thank you

[arshidkv12]

Please add unit test file also.

[mrtowers]

There will be a unit test when I'm done