Merge pull request #9071 from continuedev/nate/docs-info-command-usage

docs: update /info command description with usage statistics

Author: RomneyDa

docs/cli/quick-start.mdx

@@ -141,7 +141,7 @@ Common slash commands available in CLI:
 - `/exit` - Exit the chat
 - `/fork` - Start a forked chat session from the current history
 - `/help` - Show help message
-- `/info` - Show session information
+- `/info` - Show session information including usage statistics (cost, tokens, cache usage)
 - `/init` - Create an AGENTS.md file
 - `/login` - Authenticate with your account
 - `/logout` - Sign out of your current session