Handle Duplicate clauseId from Copy/Paste

[irmerk]

Linked Isues:

- CUI 134

- TSv2 82

---

Is your feature request related to a problem? Please describe.
Currently, a uuidv4 is assigned to each clause template added into the markdown of the contract. Copying and pasting should recognize that as already existing and create a new uuidv4

Describe the solution you'd like
When a clause template is pasted, TSv2 should check to see if a clause template exists in the pasted text. If so, check if that clause template is already in the contract. If so, assign a new uuidv4 to this clause template.

Describe alternatives you've considered
A good starting point should be SlateJS's onPaste plugin
Already in the code here

Additional context
N/A