Function to create safe java class ids

[MeAmAnUsername]

Summary
Create a function that correctly generates safe java class ids and use it everywhere.

Todo

• implement rules that transform to safe java class ids
  • regular names
  • dashes
  • keywords/java reserved words
  • Use type arguments for injected classes
• Use function everywhere (search for _ and - to find some uses)

Reason
Currently does not handle keywords, and much of the logic for escaping dashes and keywords is duplicated across multiple places.

Implementation
There is already a strategy pie-sanitize-class-id, but it is not used everywhere, and only handles dashes. To handle keywords, it could add specific rules that provide specific outputs, e.g. pie-sanitize-class-id: "super" -> "$super" (note: check if this works with strings with annotations).
To handle type arguments, it could additionally take a list of type arguments and stringify them too.

Related issues
None