Add Bicep JSON output sample to documentation

[Copilot]

This PR adds documentation for using the --jsonOutput flag with Bicep files, which was missing from the documentation.

The change adds a new section titled "JSON Output with Bicep" to the display-options.MD file, showing how to use the --jsonOutput flag with a Bicep file. This makes it consistent with the existing documentation for ARM templates and provides users with a clear example of how to get JSON output when working with Bicep files.

Changes made:

• Added a new section "JSON Output with Bicep" in the display-options.MD file
• Included a complete example showing the command and expected output
• Used consistent formatting and style with the existing documentation
• Used the existing aks-private-subnet.bicep sample to demonstrate the feature

Fixes #87.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[maniSbindra]

@copilot Please have a look at the bicep tests under https://github.com/Azure/mpf/tree/main/e2eTests. This will give you an idea of the different flags which can be passed to the utility when executing for bicep, based on which you can perhaps add more samples

[Copilot]

@copilot Please have a look at the bicep tests under https://github.com/Azure/mpf/tree/main/e2eTests. This will give you an idea of the different flags which can be passed to the utility when executi...

I've added more Bicep examples to the documentation based on the e2eTests. The updates include:

1. Detailed output with Bicep (--showDetailedOutput flag)
2. Verbose logging with Bicep (--verbose flag)

These additions complement the existing JSON output example, providing users with a more comprehensive view of the different output options available when using Bicep files.

All examples use the same aks-private-subnet.bicep sample for consistency. The changes are in commit 3ac8e93.