Expose symbol registry

[miralemd]

🚀 Feature

Expose the symbol registry on the picasso namespace and the component context.

Motivation

Enable the usage of existing symbols.

[cbt1]

This will have to be implemented in multiple steps:

• [x] Expose symbol registry via picasso.symbol & require
• [ ] Update documentation
• [ ] Update existing components so that they use require to pull in the symbol factory
• [ ] Expose symbol options on components using the symbol factory