This pr make possible to add a new parachain to a running network (see
`add_para.rs` example), for that we allow to create a new parachain
config (using the same builder but in a different context) like this:

```rs
let para_config = network.para_config_builder()
        .with_id(100)
        .with_default_command("polkadot-parachain")
        .with_collator(|c| {
            c.with_name("col-100-1")
        })
        .build()?;
```
And then deploy that parachain by calling `add_parachain` (the second
parameter of the fn allow to use a custom chain-spec for the
relaychain).

```rs
network.add_parachain(&para_config, None).await?;
```

// TODO:
- [x] docs
- [ ] test (integration)

Small fix for `pjs` example.

- Add `pjs-rs` support and mimic the
[javascript](https://polkadot.js.org/apps/#/js) tab from polkadot.js
apps/
- Allow to use an external file or just an string with the `js/ts` code,

TODO: We should implement integration tests for this feature.

Changes to publish `0.1.0-alpha.0` version.

Fix parachain spec filename (local) to use when we spawn collators.
Also, adding `Context` to spawner to improve error reporting.

cc @pgherveou



---------

Co-authored-by: PG Herveou <[email protected]>

Adding `tracing` and replace all the `println`. We should add more info
in a followup pr.
Thx!

Call `add_collator_selection` to customize `invulnerables` for both
session and aura keys.
cc @pgherveou

Following up on take 1
https://github.com/paritytech/zombienet-sdk/pull/124

Apart from better logs, I realize that one of the only thing missing now
for us to start consuming this project is a top level package available
(with it's dependencies) on crates.io. This PR serves mainly as a
discussion point to get there.
It would be great if we could publish an early version (0.0.1?) on
crates.io so that we can start using this asap.

Register the parachains (that aren't included in the genesis) after we
run the verifier and remove the need for using sleep.
Thx!

just wanted to throw a quick implementation that exposes the
OnclineClient on the node.
This would make the sdk super useful to enable cross chain e2e tests in
ink!

---------

Co-authored-by: Javier Viola <[email protected]>

- Split native provider into multiple smaller files and each with their
respective tests
- Update ProviderNode.command() to ProviderNode.program()
- Update ProviderNamespace.id() to ProviderNamespace.name()

In order to ensure that backward compatibility with existing node
Zombienet, this PR migrates (as a start) a [simple example of a test
from
Polkadot-SDK](https://github.com/paritytech/polkadot-sdk/blob/0a6dfdf973b8e7b669eda6e2ed202fb3549a20b9/polkadot/zombienet_tests/smoke/0001-parachains-smoke-test.toml),
and fixes some bugs in order to make the test work;

Fixes #106

---------

Co-authored-by: Javier Viola <[email protected]>