Blueprints?

[MichalBryxi]

In this part of README.md it is said that there a blueprints available:

> ember generate chart <chart-name>

but in this commit (converstion to v2 addon) the blueprints seem to be deleted.

Moreover when I try running said line I will get:

> pnpm exec ember generate chart time-series
Unknown blueprint: chart

Should we:

1. Delete said reference as it's no longer up-to-date?
2. Delete all other (linting, gitignore, etc.) references to blueprints?

[RobbieTheWagner]

@MichalBryxi I don't think v2 addons support blueprints, so we should probably remove reference to them.

[MichalBryxi]

Cool. Here ya go: @RobbieTheWagner #484