add readme to the commit (#585)

Author: Anmol1696

starship/tests/e2e/README.md

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+# Starship End-to-End Testing Guide
+Welcome to the Starship E2E Testing Guide.
+This guide outlines how to set up, run, and add test cases for the Starship project.
+The following instructions will enable you to execute tests locally, customize configurations, and integrate tests into GitHub Actions for continuous integration.
+
+## Table of Contents
+* [Overview](#overview)
+* [Setup](#setup)
+* [Running Tests Locally](#running-tests-locally)
+  * [Setup the Kubernetes Cluster](#setup-the-kubernetes-cluster)
+  * [Install the Helm Chart](#install-the-helm-chart)
+  * [Port Forward Services](#port-forward-services)
+  * [Run Tests](#run-tests)
+* [Available Configurations](#available-configurations)
+  * [GitHub Actions Integration](#github-actions-integration)
+  * [Adding Tests to PR Workflow](#adding-tests-to-pr-workflow)
+
+## Overview
+This guide is intended for developers working on the Starship project to run E2E tests locally and contribute test cases.
+Tests can be run multiple times to ensure idempotency. A variety of configurations in the `configs/` directory allows testing different setups.
+
+## Setup
+Ensure you have the following prerequisites:
+* Kubernetes setup (recommended: Docker Desktop with kubernetes support for local setups): [Docker Desktop](https://www.docker.com/products/docker-desktop/
+* `kubectl`: [Installation Guide](https://kubernetes.io/docs/tasks/tools/)
+* `helm`: [Installation Guide](https://helm.sh/docs/intro/install/)
+* `yq`: [Installation Guide](https://mikefarah.gitbook.io/yq/v3.x)
+* `jq`: [Installation Guide](https://jqlang.github.io/jq/download/)
+
+## Running Tests Locally
+1. Setup the Kubernetes Cluster:
+
+   To start a local Kubernetes cluster with Docker Desktop follow steps:
+   * From the Docker Dashboard, select the Settings.
+   * Select Kubernetes from the left sidebar.
+   * Next to Enable Kubernetes, select the checkbox.
+   * Select Apply & Restart to save the settings and then click Install to confirm.
+
+2. Install the Helm Chart:
+
+   Once the cluster is ready, install the Helm chart with a specific configuration file, for example, `configs/two-chain.yaml`:
+   ```bash
+   make install HELM_FILE=configs/two-chain.yaml
+   ```
+
+3. Check pod statues:
+
+   Check the status of the pods to ensure everything is running before proceeding:
+   ```bash
+   kubectl get pods
+   ```
+
+4. Port Forward Services:
+
+   After confirming the pods are in the Running state, forward the necessary ports:
+   ```bash
+   make port-forward HELM_FILE=configs/two-chain.yaml
+   ```
+
+5. Run Tests:
+
+   Run the test suite with the following command:
+   ```bash
+   make test HELM_FILE=configs/two-chain.yaml
+   ```
+   These tests are designed to be idempotent, meaning you can run make test multiple times as needed.
+
+## Available Configurations
+In the `configs/` directory, you’ll find various configuration files that specify different test setups.
+Some examples include:
+```
+one-chain.yaml
+multi-validator.yaml
+simapp.yaml
+two-chain.yaml
+```
+
+Feel free to test with any of these configurations by adjusting the `HELM_FILE` parameter.
+
+## GitHub Actions Integration
+### Adding Tests to PR Workflow
+The workflow for PR tests is defined in `.github/workflows/pr-tests.yaml`.
+This workflow runs on pull requests to the `main` and `release/*` branches, as well as on a daily schedule.
+
+### Resource Limitations
+Since GitHub Actions runners have limited resources, be cautious when adding resource-intensive configurations to the PR tests.
+Only the following configurations are currently enabled in the PR tests:
+```
+one-chain-custom-scripts.yaml
+one-chain.yaml
+multi-validator.yaml
+simapp.yaml
+multi-validator-starship-faucet.yaml
+```
+
+To add a new test configuration, simply include it in the `matrix.config-file` section of the `pr-test` job in `.github/workflows/pr-tests.yaml`.
+Ensure the configuration is efficient enough for GitHub Actions runners.