feat(core): export complete type system from core module (CLI-4, CLI-5)

Implements public API for CLI-4 and CLI-5 type system.

Exports Added:

From types.py:
- Core semantic types: BranchId, ActionId, OptionKey, MenuId, StateValue
- Factory functions: make_branch_id, make_action_id, make_option_key, make_menu_id
- Type guards: is_branch_id, is_action_id, is_option_key, is_menu_id
- Collection types: BranchList, BranchSet, ActionList, ActionSet, OptionDict, MenuList

From models.py:
- Base: StrictModel, BaseConfig
- Actions: BashActionConfig, PythonActionConfig, ActionConfigUnion
- Options: StringOptionConfig, SelectOptionConfig, PathOptionConfig, NumberOptionConfig, BooleanOptionConfig, OptionConfigUnion
- Navigation: MenuConfig, BranchConfig, WizardConfig
- State: SessionState, StateValue
- Results: ActionResult, CollectionResult, NavigationResult

From protocols.py:
- Core protocols: WizardConfig, BranchConfig, SessionState
- Execution protocols: ActionExecutor, OptionCollector, NavigationController

Benefits:
- Clean public API surface
- Single import point: from cli_patterns.core import ...
- Clear separation of public vs internal APIs
- Complete type system available to consumers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: dugshub

src/cli_patterns/core/__init__.py

@@ -1 +1,116 @@
-"""Core types and protocols for CLI Patterns."""
+"""Core types and protocols for CLI Patterns.
+
+This module provides the foundational type system for the CLI Patterns framework:
+
+Types:
+    - Semantic types: BranchId, ActionId, OptionKey, MenuId
+    - State value types: StateValue (JSON-serializable)
+    - Type guards and factory functions
+
+Models:
+    - Configuration models: WizardConfig, BranchConfig, MenuConfig
+    - Action models: BashActionConfig, PythonActionConfig
+    - Option models: StringOptionConfig, SelectOptionConfig, etc.
+    - State models: SessionState
+    - Result models: ActionResult, CollectionResult, NavigationResult
+
+Protocols:
+    - ActionExecutor: For executing actions
+    - OptionCollector: For collecting option values
+    - NavigationController: For navigation control
+"""
+
+# Semantic types and utilities
+# Configuration models
+from cli_patterns.core.models import (
+    ActionConfigUnion,
+    ActionResult,
+    BaseConfig,
+    BashActionConfig,
+    BooleanOptionConfig,
+    BranchConfig,
+    CollectionResult,
+    MenuConfig,
+    NavigationResult,
+    NumberOptionConfig,
+    OptionConfigUnion,
+    PathOptionConfig,
+    PythonActionConfig,
+    SelectOptionConfig,
+    SessionState,
+    StringOptionConfig,
+    WizardConfig,
+)
+
+# Protocols
+from cli_patterns.core.protocols import (
+    ActionExecutor,
+    NavigationController,
+    OptionCollector,
+)
+from cli_patterns.core.types import (
+    ActionId,
+    ActionList,
+    ActionSet,
+    BranchId,
+    BranchList,
+    BranchSet,
+    MenuId,
+    MenuList,
+    OptionDict,
+    OptionKey,
+    StateValue,
+    is_action_id,
+    is_branch_id,
+    is_menu_id,
+    is_option_key,
+    make_action_id,
+    make_branch_id,
+    make_menu_id,
+    make_option_key,
+)
+
+__all__ = [
+    # Types
+    "ActionId",
+    "ActionList",
+    "ActionSet",
+    "BranchId",
+    "BranchList",
+    "BranchSet",
+    "MenuId",
+    "MenuList",
+    "OptionDict",
+    "OptionKey",
+    "StateValue",
+    "is_action_id",
+    "is_branch_id",
+    "is_menu_id",
+    "is_option_key",
+    "make_action_id",
+    "make_branch_id",
+    "make_menu_id",
+    "make_option_key",
+    # Models
+    "ActionConfigUnion",
+    "ActionResult",
+    "BaseConfig",
+    "BashActionConfig",
+    "BooleanOptionConfig",
+    "BranchConfig",
+    "CollectionResult",
+    "MenuConfig",
+    "NavigationResult",
+    "NumberOptionConfig",
+    "OptionConfigUnion",
+    "PathOptionConfig",
+    "PythonActionConfig",
+    "SelectOptionConfig",
+    "SessionState",
+    "StringOptionConfig",
+    "WizardConfig",
+    # Protocols
+    "ActionExecutor",
+    "NavigationController",
+    "OptionCollector",
+]