refactor(models): remove legacy host-specific models from models.py

BREAKING CHANGE: Remove all legacy host-specific configuration models
that are now replaced by the unified adapter architecture.

Removed models:
- MCPServerConfigBase (abstract base class)
- MCPServerConfigGemini
- MCPServerConfigVSCode
- MCPServerConfigCursor
- MCPServerConfigClaude
- MCPServerConfigKiro
- MCPServerConfigCodex
- MCPServerConfigOmni
- HOST_MODEL_REGISTRY

The unified MCPServerConfig model plus host-specific adapters now
handle all MCP server configuration. See:
- hatch/mcp_host_config/adapters/ for host adapters

This is part of Milestone 3.1: Legacy Removal in the adapter architecture
refactoring. Tests will need to be updated in subsequent commits.

Author: LittleCoinCoin

hatch/mcp_host_config/__init__.py

@@ -3,38 +3,38 @@
 This module provides MCP host configuration management functionality,
 including backup and restore capabilities for MCP server configurations,
 decorator-based strategy registration, and consolidated Pydantic models.
+
+Architecture Notes (v2.0 - Unified Adapter Architecture):
+- MCPServerConfig is the single unified model for all MCP configurations
+- Host-specific serialization is handled by adapters in hatch/mcp_host_config/adapters/
+- Legacy host-specific models (MCPServerConfigGemini, etc.) have been removed
 """
 
 from .backup import MCPHostConfigBackupManager
 from .models import (
     MCPHostType, MCPServerConfig, HostConfiguration, EnvironmentData,
     PackageHostConfiguration, EnvironmentPackageEntry, ConfigurationResult, SyncResult,
-    # Host-specific configuration models
-    MCPServerConfigBase, MCPServerConfigGemini, MCPServerConfigVSCode,
-    MCPServerConfigCursor, MCPServerConfigClaude, MCPServerConfigKiro,
-    MCPServerConfigCodex, MCPServerConfigOmni,
-    HOST_MODEL_REGISTRY
 )
 from .host_management import (
     MCPHostRegistry, MCPHostStrategy, MCPHostConfigurationManager, register_host_strategy
 )
 from .reporting import (
     FieldOperation, ConversionReport, generate_conversion_report, display_report
 )
+from .adapters import HostAdapterRegistry
 
 # Import strategies to trigger decorator registration
 from . import strategies
 
 __all__ = [
     'MCPHostConfigBackupManager',
+    # Core models
     'MCPHostType', 'MCPServerConfig', 'HostConfiguration', 'EnvironmentData',
     'PackageHostConfiguration', 'EnvironmentPackageEntry', 'ConfigurationResult', 'SyncResult',
-    # Host-specific configuration models
-    'MCPServerConfigBase', 'MCPServerConfigGemini', 'MCPServerConfigVSCode',
-    'MCPServerConfigCursor', 'MCPServerConfigClaude', 'MCPServerConfigKiro',
-    'MCPServerConfigCodex', 'MCPServerConfigOmni',
-    'HOST_MODEL_REGISTRY',
+    # Adapter architecture
+    'HostAdapterRegistry',
     # User feedback reporting
     'FieldOperation', 'ConversionReport', 'generate_conversion_report', 'display_report',
+    # Host management
     'MCPHostRegistry', 'MCPHostStrategy', 'MCPHostConfigurationManager', 'register_host_strategy'
 ]