Add/Update Shape Tokens

[myvuuu]

🚀 Feature Proposal

Update Shape tokens by:

• [ ] Add two new levels of border radius
• [ ] Shift Shape token scale back from XS-XXL (once we add the two new border radius) --> XS-XL to be consistent with the sizing/scaling of other Canvas tokens
• [ ] Create a code mod to help teams adjust to the new scale
• [ ] Update migration guide