Add ServiceCollectionExtensions with per-module DI registration for ACAT core

[Copilot]

The DI setup was a single monolithic AddACATServices() in Utility/ServiceConfiguration.cs with no per-module granularity, and the required DependencyInjection/ServiceCollectionExtensions.cs file was absent.

Changes

• New: ACATCore/DependencyInjection/ServiceCollectionExtensions.cs
  Per-module IServiceCollection extension methods in the ACAT.Core.DependencyInjection namespace:

  Method	Registers
  AddActuatorManagement()	ActuatorManager, IActuatorManager, IActuatorManagerFactory
  AddAgentManagement()	AgentManager, IAgentManager, IAgentManagerFactory
  AddTTSManagement()	TTSManager, ITTSManager, ITTSManagerFactory
  AddPanelManagement()	PanelManager, IPanelManager, IPanelManagerFactory
  AddThemeManagement()	ThemeManager, IThemeManager, IThemeManagerFactory
  AddWordPrediction()	WordPredictionManager + interface + factory
  AddSpellChecking()	SpellCheckManager + interface + factory
  AddAbbreviationsManagement()	AbbreviationsManager + interface + factory
  AddCommandManagement()	CommandManager + interface + factory
  AddEventManagement()	AutomationEventManager, IEventBus + factory
  AddCQRSHandlers()	Command/query handlers (Transient)
  AddRepositories()	IRepository<Theme>
  AddDiagnostics()	PanelActivityMonitor
  AddACATCoreModules()	Aggregate — calls all of the above

• Updated: ServiceConfiguration.AddACATServices() now delegates to AddACATCoreModules(), eliminating the inline duplication while keeping the existing public API intact.

• Updated: ACAT.Core.csproj — explicit <Compile> entry added (required; project has EnableDefaultCompileItems=false).

Host applications that only need a subset of ACAT can now opt in per module:

services
    .AddTTSManagement()
    .AddWordPrediction();

Or register everything at once (existing pattern, unchanged):

services.AddACATServices(); // delegates to AddACATCoreModules() internally

All managers remain Singleton-scoped to match the existing static-singleton behaviour.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Setup Service Container</issue_title>
<issue_description>Configure Microsoft.Extensions.DependencyInjection in Program.cs and establish service registration patterns.

Acceptance Criteria:

• ServiceCollection configured in ACATApp and ACATTalk
• ServiceCollectionExtensions created for core modules
• Service lifetimes properly configured
• Documentation for service registration patterns
• Build passing, no regressions

Technical Details:

• Add Microsoft.Extensions.DependencyInjection NuGet package
• Create ConfigureServices() method in Program.cs
• Register logging infrastructure
• Register configuration services
• Create extension methods for module registration

Files to Modify:

• Applications/ACATApp/Program.cs
• Applications/ACATTalk/Program.cs
• Create Libraries/ACATCore/DependencyInjection/ServiceCollectionExtensions.cs

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Epic: Dependency Injection Infrastructure

Estimated Effort: 2 days

</issue_description>

<agent_instructions>Review any existing work done on this task, as well as the current state of the Phase 2 Status update to determine what needs to be done to complete this task.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Setup Service Container #209

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