feat: add lesson export and import functionality

- Implemented `LessonExport` and `LessonImport` actions in the action module.
- Added corresponding command parsing for lesson export and import.
- Created functions to handle lesson export and import in the memory module.
- Updated state management to reflect changes after lesson operations.
- Introduced deferred operations for handling asynchronous tasks in the event loop.
- Enhanced the tool execution context to include graduated checks for file operations.
- Added OAuth support with PKCE for secure authorization flows.
- Implemented a loopback server for handling OAuth redirects.
- Refactored various modules to improve code organization and maintainability.

src/controller/input.rs

@@ -1,8 +1,10 @@
 use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
 
 use crate::app::runtime::actions::Action;
+use crate::app::runtime::commands::apply_command;
 use crate::app::state::rest::AppStateRest;
 use crate::app::state::types::Overlay;
+use crate::controller::command::parse_command;
 
 pub fn handle_key(key: KeyEvent, state: &AppStateRest) -> Vec<Action> {
     match key.code {
@@ -18,7 +20,7 @@ pub fn handle_key(key: KeyEvent, state: &AppStateRest) -> Vec<Action> {
             }
             let text = state.input.buffer.clone();
             if text.starts_with('/') {
-                return Vec::new();
+                return apply_command(parse_command(&text));
             }
             vec![Action::SubmitInput(text)]
         }