🎨 Reorganize the components and theme creation API

[BattleCh1cken]

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Summary

Closes #44 and #28.

Checklist

• [x] I have fully tested all of the added features
• [ ] I have fully documented all of the relevant code
• [x] rules constructor
• [x] various component constructors
  • [x] decision-matrix
  • [x] admonitions
  • [x] plot
  • [x] pie-chart
• [x] finish porting radial and linear to the new constructors

Additional Notes

[BattleCh1cken]

Currently the documentation is still incomplete but I'm opening this up for review because I'm interested to know what you guys think.