feat(cli): add --no-auto-memory flag to disable memory reminder in agent mode

Adds a flag to disable the automatic memory update reminder that runs
at the end of agent mode. Useful when running agents that should not
modify project memory.

crates/g3-cli/src/lib.rs

@@ -90,6 +90,7 @@ pub async fn run() -> Result<()> {
             cli.safari,
             cli.chat,
             cli.include_prompt.clone(),
+            cli.no_auto_memory,
         )
         .await;
     }