Add chronicle event-store-subscriptions list/add/remove support and documentation

[Copilot]

Summary

Adds CLI support for Chronicle event store subscriptions by wiring IEventStoreSubscriptions into command surface area and completion. Includes end-to-end integration coverage and Chronicle documentation for the new command group.

Added

• New chronicle event-store-subscriptions branch with list, add, and remove commands wired to IServices.EventStoreSubscriptions (#0000)
• Command settings for subscription identifier, source event store, and event type input parsing (#0000)
• Integration spec: for_EventStoreSubscriptions/when_adding_and_removing_event_store_subscription (#0000)
• New Chronicle docs page: Documentation/chronicle/event-store-subscriptions.md covering list, add, and remove usage (#0000)

Changed

• Dynamic completion now supports event-store-subscriptions identifiers via _complete context resolution (#0000)
• Chronicle branch registration text now includes event store subscriptions in the top-level command map (#0000)
• Chronicle documentation navigation updated to include Event Store Subscriptions in Documentation/chronicle/toc.yml and Documentation/chronicle/index.md (#0000)

await services.EventStoreSubscriptions.Add(new AddEventStoreSubscriptions
{
    TargetEventStore = settings.ResolveEventStore(),
    Subscriptions =
    [
        new EventStoreSubscriptionDefinition
        {
            Identifier = settings.SubscriptionId,
            SourceEventStore = settings.SourceEventStore,
            EventTypes = settings.EventTypes
                .Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
                .Select(id => new EventType { Id = id })
                .ToList()
        }
    ]
});

Fixed

• CLI gap where EventStoreSubscriptions contract methods (GetSubscriptions, Add, Remove) were available in contracts but not exposed through Chronicle commands (#0000)

Removed

• None (#0000)

Security

• None (#0000)

Deprecated

• None (#0000)

[einari]

@copilot We need documentation on this as well.

[Copilot]

@copilot We need documentation on this as well.

Added Chronicle documentation for event-store-subscriptions (list, add, remove) and linked it in the Chronicle overview and TOC. Addressed in commit 55a523f.