import sessions

### Describe the feature or problem you'd like to solve

there is a command current /export that export the session as a file , i want something in reverse to import from it

### Proposed solution

load/import a session from an exported markdown file or any kind of exported file

### Example prompts or workflows

_No response_

### Additional context

_No response_

Start by locating the existing /export command and tracing how it serializes a session. Compare the exported markdown or other file format with the session-loading path, then define and test a reverse workflow that restores an exported session; done means an exported session can be imported successfully.

Scritto dal modello di indicizzazione a partire dal testo della issue.