[New azd-template] Adding Durable Functions and remote MCP samples to AZD Gallery

[lilyjma]

This issue adds a set of Azure Functions azd templates to the AZD Gallery.

Durable Functions quickstarts (fan-out/fan-in, Flex Consumption, secure by default)

• Java - durable-functions-quickstart-java-azd
• JavaScript - durable-functions-quickstart-javascript-azd
• PowerShell - durable-functions-quickstart-powershell-azd
• Python - durable-functions-quickstart-python-azd
• TypeScript - durable-functions-quickstart-typescript-azd

Remote MCP server on Azure Functions

• JavaScript - remote-mcp-functions-javascript
• .NET (long-running tools with Durable Functions) - mcp-functions-long-running-tools

All templates (code, IaC) have been tested end to end on Azure.

[lilyjma]

Marina He (@hemarina) could you help with this please?

[hemarina]

Lily Ma (@lilyjma) Could you review #912 and let me know if you have any preferences? Please also provide screen shots for testing. Thank you in advance.