docs: Add reference documentation for Microsoft.Windows/FirewallRuleList

[Gijsreyn]

PR Summary

This pull request adds reference documentation for the built-in DSC resource Microsoft.Windows/FirewallRuleList.

[Copilot]

Pull request overview

Adds reference documentation and examples for the built-in DSC resource Microsoft.Windows/FirewallRuleList, describing its schema, capabilities, and common usage patterns for getting/setting/exporting Windows Firewall rules.

Changes:

• Added a full resource reference page including properties, schema, exit codes, and links to examples.
• Added a “get/toggle/export” CLI example page for dsc resource usage.
• Added a configuration-document example (YAML) plus a walkthrough for dsc config test/set and rule removal.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
docs/reference/resources/Microsoft/Windows/FirewallRuleList/index.md	New reference page for the resource (syntax, properties, schema, exit codes, links).
docs/reference/resources/Microsoft/Windows/FirewallRuleList/examples/get-firewall-rules.md	New CLI-oriented example for get/set/export behavior.
docs/reference/resources/Microsoft/Windows/FirewallRuleList/examples/firewall.config.dsc.yaml	New sample DSC config document defining two firewall rules.
docs/reference/resources/Microsoft/Windows/FirewallRuleList/examples/configure-firewall-rules.md	New walkthrough demonstrating config test/set and rule removal.

[Gijsreyn]

@SteveL-MSFT - one of the remarks from Copilot was the min/max on the protocol property. Even though, when running it, for example, with 257, the executable throws a useful error message. However, I have updated the resource manifest to include both minimum and maximum, as I do think it adds value for authoring-time feedback and fails early without spawning a process.

If not, let me know, and I'll remove it from the docs.