Checklist Levels

[antdking]

Currently what we have is a flat checklist. This is great for giving a general overall score, however it can mean it's hard to see iterative improvements.

There are also certain targets that are difficult to hit if you've not been trying to reach them from the start.

I propose introducing Levels, where we can define a baseline of "you must hit these ASAP", while being able to define extended requirements that are less critical to implement.

This will no doubt resolve into a similar situation to Core skills, where people get stickers.

[davidwinter]

Think this ties into the discussions we had with Chris around what are the must haves. Heavy focus was on tests and coverage. Will put some suggestions in here based on the spreadsheet changes Mark made so we can discuss further.

[booyaa]

Going to raise a PR to include the baseline minimum in the checklist.