Add a progress bar vignette

[xsebek]

• add a scenario showing an in-world progress bar

The motivation is that I eventually plan to use a similar system to report progress of tests.

Recording

[byorgey]

Looks nice! It makes me wonder whether it would be worth adding a built-in, more streamlined way to include text entities, in cases like this when you want to label things on a world map.

[xsebek]

Yeah, something like this would be nice:

palette:
  - char: 'X'  # {name: "X", display: {char: "X"}, description: ["X"], properties: [known]}