Add more metadata fields when pressing in “Add to VS Code” via the API center portal

# What are you trying to achieve?

My GitHub Copilot organization uses an API Center MCP Registry with the
[“Registry only” policy](https://docs.github.com/en/copilot/how-tos/administer-copilot/manage-mcp-usage/configure-mcp-server-access). Essentially I would like to use the API center portal's "Install in VS Code" as a recommended way for our developers to install allowed MCP servers with a simple click.

Azure API Center's “Add to VS Code” action for a registered remote MCP server currently only generates:

```json
{
"AKS MCP Server": {
"type": "http",
"url": "https://my-uri/mcp"
},

"Terraform MCP Server": {
"type": "http",
"url": "https://myurl2/mcp"
},
}
```

# Proposed solution

Support setting more fields from metadata . At least gallery and version are required from what I can see. If these fields are not present the installation of the MCP server will be blocked.

Supporting extra fields such as oauth and headers would also be beneficial

```json
"AKS MCP Server": {
"type": "http",
"url": "https://myuri1/mcp",
"oauth": {
"clientId": "my-wellknown-clientid"
},
"gallery": "https://p-ne1apim-apicenter.data.swedencentral.azure-apicenter.ms/workspaces/default",
"version": "v1"
},
"terraform-mcp-server": {
"type": "http",
"url": "https://myuri2/mcp",
"gallery": "https://p-ne1apim-apicenter.data.swedencentral.azure-apicenter.ms/workspaces/default",
"version": "v1",
"headers": {
"Ocp-Apim-Subscription-Key": "placeholder-subkey"
}
},
```

# Alternative solutions

Need to create manual docs or manually crafted VSCode install links. I successfully managed to create a `https://vscode.dev/redirect?url=vscode%...` uri which has every setting I need

# Additional context

https://p-ne1apim-apicenter.portal.swedencentral.azure-apicenter.ms/servers/aks-mcp-server

example MCP server which demonstrates the issue.