augogenerated by copilot tbh

reasons:
- giu.Context is a public variable of private type
- giu.CreateContext is a public function that has unexported return (revive complains)

reasons:
- this example uses not-recommended API - users should use Font Atlas and StyleSetter

reason:
- this name is more meaningful
- this is a common question so maybe someone'll find it before asking in giu

also added package comment

reasons:
- the new name better describes the content

also add package comment

reasons:
- this problem is particulary easy to fix
- i don't think its really common and could be easily found on gh

…ttemptN