feat: function plots

[PaulRBerg]

Context

This PR integrates the function-plot package to plot the streaming curves directly on the docs website rather than redirecting the user to Desmos.

Plots

• [x] Lockup Linear: Simple
• [x] Lockup Linear: Cliff
• [x] Lockup Dynamic: Exponential
• [x] Lockup Dynamic: Exponential Cliff
• [x] Lockup Dynamic: Traditional Unlocks

Preview

This is how it looks for Lockup Linear:

[maxdesalle]

Added the graph functions @PaulRBerg! Let me know if you want me to change something.

[PaulRBerg]

Thanks @maxdesalle, super cool work! Made a few refinements, and merging now.