docs(operator-wand): Add a local-development.md (#79)

charts/operator-wandb/local-development.md

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+# Helm Chart Operator Development Guide
+
+This guide provides instructions for local development and testing of the Helm chart operator for the `wandb/helm-charts` repository. It includes setup instructions, development workflow, and guidelines for contributing to the repository.
+
+## Prerequisites
+
+- Helm (3.x+)
+- kubectl (configured with access to your Kubernetes cluster)
+- AWS CLI (configured with the necessary permissions)
+- Azure CLI
+- Google Cloud SDK
+
+## Setup
+
+### 1. Cloud Provider Login
+
+#### AWS
+
+Update your kube-context for the EKS cluster:
+
+```bash
+aws eks update-kubeconfig --name smooth-operator --region us-west-2
+```
+
+#### Azure
+
+Log in to Azure CLI:
+
+```bash
+az login
+az account set --subscription <Subscription_ID>
+az aks get-credentials --resource-group <Resource_Group_Name> --name <AKS_Cluster_Name>
+```
+
+
+#### GCP
+
+Authenticate with the Google Cloud SDK:
+
+```bash
+gcloud auth login
+gcloud container clusters get-credentials YOUR_CLUSTER_NAME --zone YOUR_ZONE --project YOUR_PROJECT
+```
+
+### 2. Clone the Helm Charts Repository
+
+Clone the `wandb/helm-charts` repository:
+
+```bash
+git clone https://github.com/wandb/helm-charts.git
+cd helm-charts
+```
+
+### 3. Initial Setup for Development
+
+Extract the current values from the deployed Helm chart and scale down the `wandb-controller-manager` deployment:
+
+```bash
+helm get values wandb > operator-spec.yaml
+kubectl scale --replicas=0 deployment -n wandb wandb-controller-manager
+```
+
+### 4. Develop and Test Your Changes
+
+After extracting the current chart values into `operator-spec.yaml`, you can start making your changes to the chart or the operator specifications.
+
+#### Building Dependencies
+
+Before deploying your changes, ensure that any chart dependencies are updated:
+
+```bash
+helm dependency build ./charts/operator-wandb
+```
+
+#### Upgrading the Helm Release
+
+To apply your changes, upgrade the Helm release with your modified specifications:
+
+```bash
+helm upgrade \
+    --install wandb \
+    ./charts/operator-wandb -f ./operator-spec.yaml
+```
+
+### 5. Finalizing Development
+
+After completing your development work:
+
+1. Ensure to increment the version in `Chart.yaml` of your Helm chart, e.g., `0.10.43`.
+2. Scale the `wandb-controller-manager` deployment back up:
+
+    ```bash
+    kubectl scale --replicas=1 deployment -n wandb wandb-controller-manager
+    ```
+
+## Contributing
+
+After testing your changes locally, submit a pull request with your modifications. Ensure your commits are well-documented, and your PR includes a summary of the changes and any testing performed.