Refactor/cli command manager (#178)

* feat(cli): migrate command handling to CommandManager and enhance UI interactions

* feat(cli): add /clear and /help commands to enhance user experience

* feat(cli): implement /new and /resume commands with interactive session management

* Refactor MCP and Skills Command Handling

- Moved the interactive picker style to a centralized widget for consistency across MCP and Skills commands.
- Updated the MCP command to remove the old command dispatch logic, delegating to the new InstallMCPCommand.
- Enhanced the Skills command to utilize a new interactive picker for skill selection, improving user experience.
- Implemented cancellation handling in the picker to differentiate between user cancellations and empty selections.
- Added comprehensive tests for the new command structures and picker functionalities to ensure reliability.

* refactor(cli): streamline CommandManager dispatch and remove deprecated command set

* refactor(cli): enhance error handling and state management in ChannelCommand and RichCLICommandUI

* refactor(cli): update lifecycle callback terminology and improve async prompt handling in RichCLICommandUI

* refactor(cli): enhance SlashCommandCompleter to dynamically fetch workspace directory for autocompletion

* refactor(cli): unify quit handling in RichCLICommandUI with shared _stop helper

* refactor(cli): remove hardcoded slash commands and utilize command manager for dynamic completion

* refactor(cli): update MCP and skills command files for improved clarity and organization

* refactor(mcp_ui): remove unnecessary newline in _show_mcp_config function

tests/test_current_command.py

@@ -0,0 +1,41 @@
+"""Tests for the /current command."""
+
+from unittest.mock import MagicMock
+
+from tests.conftest import run_async as _run
+
+
+class TestCurrentCommand:
+    def test_prints_thread_workspace_and_memory(self):
+        from EvoScientist.commands.base import CommandContext
+        from EvoScientist.commands.implementation.general import CurrentCommand
+
+        ui = MagicMock()
+        ctx = CommandContext(
+            agent=None,
+            thread_id="abc123",
+            ui=ui,
+            workspace_dir="/tmp/ws",
+        )
+        _run(CurrentCommand().execute(ctx, []))
+        # Three append_system calls: Thread, Workspace, Memory dir.
+        calls = [c.args[0] for c in ui.append_system.call_args_list]
+        assert any("Thread: abc123" in s for s in calls)
+        assert any("Workspace:" in s for s in calls)
+        assert any("Memory dir:" in s for s in calls)
+
+    def test_skips_workspace_when_none(self):
+        from EvoScientist.commands.base import CommandContext
+        from EvoScientist.commands.implementation.general import CurrentCommand
+
+        ui = MagicMock()
+        ctx = CommandContext(
+            agent=None,
+            thread_id="abc123",
+            ui=ui,
+            workspace_dir=None,
+        )
+        _run(CurrentCommand().execute(ctx, []))
+        calls = [c.args[0] for c in ui.append_system.call_args_list]
+        assert any("Thread: abc123" in s for s in calls)
+        assert not any("Workspace:" in s for s in calls)