tutorial runner breaks when ts code snippets do not have filename

[barriebyron]

these lines broke a tutorial CI:

  ```ts
  const { privateKey: deployerKey, publicKey: deployerAccount } = Local.testAccounts[0];
  const { privateKey: senderKey, publicKey: senderAccount } = Local.testAccounts[1]; 

The tutorial runner will grab all code blocks that have the `ts` annotation and expects that there is a filename associated with it.

Can we think about introducing a way to ignore ts code blocks for better syntax highlighting?
it will be helpful if we could use ts ignore or something