Update readme; add contribution guidelines

# SUNRISE-6G Open-SDK

# OpenSDK - Contribution Guidelines

WIP

Thank you for contributing to this project! Please follow the guidelines below to ensure a smooth collaboration.

## Branch Naming Convention

Each partner should create a feature branch following the naming convention based on the type of adapter they are contributing:

### ☁️ EdgeCloud Adapters

Branch Name Format:

```

feature/add-edgecloud-<EDGE_CLOUD_PLATFORM_NAME>

```

Example:

```

feature/add-edgecloud-i2edge

```

### 🌐 Network Adapters

Branch Name Format:

```

feature/add-network-<5G_CORE_NAME>

```

Example:

```

feature/add-network-open5gs

```

## Directory Structure

Each contribution should be made in the appropriate directory:

- **EdgeCloud Adapters** → `src/edgecloud/clients/`

- **Network Adapters** → `src/network/clients/`

## Unit Tests Requirement

To merge a feature branch into `main`, the adapter **must include unit tests** under the `/tests` directory.

Ensure that your unit tests cover the main functionalities of the adapter.

## Steps to Contribute

1. **Fork the Repository** (if applicable).

2. **Create a New Branch** following the naming convention.

3. **Develop Your Feature** inside the correct directory.

4. **Write Unit Tests** under `/tests`.

5. **Submit a Merge Request (MR)** to the `main` branch.

6. **Ensure All Tests Pass** before the merge.

## Sequence Diagram Example

Refer to the sequence diagram example from `docs/workflows/edgecloud/get_av_zones.md` for guidance on workflow structure:

```mermaid

sequenceDiagram

title Retrieve Edge Cloud Zones

actor AP as App Vertical Provider

participant CE as Capabilities Exposure

box Service Resource Manager

    participant API

    participant SDK as EdgeCloudSDK

end

participant i2Edge

participant PiEdge

note over AP,CE: CAMARA EdgeCloud API

AP ->> CE: GET /edge-cloud-zones

CE ->> API: GET /av. zones

API ->> SDK: sbi = EdgeCloudFactory.create_edgecloud_client(i2Edge)

API ->> SDK: sbi.get_edge_cloud_zones()

SDK ->> i2Edge: GET /zones/list

API ->> SDK: sbi = EdgeCloudFactory.create_edgecloud_client(PiEdge)

API ->> SDK: sbi.get_edge_cloud_zones()

SDK ->> PiEdge: GET /nodes

```