- pjs-rs behind feature gate
- Docker fixes

fix #214 
- Fix docker leaking containers
- Also fix docker download helpers
- Improve docker rm _namespaced_ containers



cc: @michalkucharczyk

This pr introduce the ability to set the `base_dir` used by the
`namespace`. This allow users to reuse the same node's directories
(config and database) and re-start the network from the latest state in
sequential runs.

Thx!

fix #218

cc @sandreim thanks for the suggestion :)

fix #210 

Also fix the log cmd string.

cc @michalkucharczyk , thanks!!

Firstly, thank you for an amazing library! The original zombienet is a
Polkadot staple and now being able to use it completely from Rust is a
game changer for us: as you may be aware, we have integrated
zombienet-sdk with
[pop-cli](https://github.com/paritytech/zombienet-sdk).

In doing so, we needed to add a few getters to the public api to be able
to present certain information to the user, as well we expose a little
more of the inner errors. This PR simply upstreams these changes.

It also includes two additional fixes, which may be better implemented
based on your guidance:
- collator args werent working for us when specified in a config file,
which seemed to be due to missing `--` in the args list provided by
calling functions.
- artifact path wasnt set when trying to build a chain spec. This may no
longer be required based on the changes in
https://github.com/paritytech/zombienet-sdk/commit/c7ce50c0

I am happy to add tests if you are open to these changes. 

Couple of fixes for docker provider and to use an external tool to build
the chain-spec.

docker support 

---------

Co-authored-by: Javier Viola <javier@parity.io>

Add:
 - logs methods in NetworkNode

- [k8s] fix `cmd` generator for collators (needs to use exposed ports).

based on #190 

cc: @s0me0ne-unkn0wn

Fix https://github.com/paritytech/zombienet-sdk/issues/169

- Add logic to retrieve available args from node before spawning the
full network using the output of the command with --help

A follow-up of #171 with the same motivation.

Concatenating the command line option and its value doesn't really work.
The shell treats `--opt val` as a single argument `--opt val` instead of
`--opt` `val` and fails to execute. This PR fixes that by separating
options from their values.

Error example:
```
error: unexpected argument '--workers-path ~/.cargo/bin/workers-1.6' found

  tip: a similar argument exists: '--workers-path'
```

Co-authored-by: Javier Viola <363911+pepoviola@users.noreply.github.com>

Add: 
  - async drop impl in k8s namespace / `noop` in native.
  - Modify example test.

Add:
 - Logic to use db_snapshot in both native/k8s providers
 - Small fix on chain_spec_path (for both native/k8s)
 - New example `db_snapshot`

Add small validation, mostly to ensure that the `image` is set in k8s.

fix #143

- Remove workaround on temp  node issues. (fixed in wrapper).

Fix typo :)

- Add clean disk space action.

Fix #173 

We should also add a follow up issue to improve the docs.

cc: @s0me0ne-unkn0wn

- Add `custom_parchain_fs_prefix` parameter to `add_para` fn (on running
network), this allow to manage the fs layout and allow to add paras with
the same id.
- Minor clippy auto-fixes

cc: @metricaez

---------

Co-authored-by: Loris Moulin <45130584+l0r1s@users.noreply.github.com>