yaml formatting errors

[slimslenderslacks]

There are 3 things to point out in the above screen:

1. I have copy/pasted the exact contents of the error in the blog post. I guess we need to accelerate the LSP showing these errors but I'm also wondering how this can be fixed on auto-save?
2. When you try to run, I'm now at least showing an error (circled on the right). I don't want to necessarily stop processing because eventually we'll be able to self-correct some of this. But we should at least highlight that the yaml was not parse-able
3. There are these entering tool messages. These messages definitely exist but I think they should only be shown during debug.