Update v7.0 demos/examples

[arjunhassard]

Potential features:

• Dashboard for monitoring/flagging Ursula status (particularly useful for Permissionless cohort users)

Note: dependent on bindings etc

[piotr-roslaniec]

Do we know what is the scope of this demo?

For nucypher-ts we have the following demos:

• https://github.com/nucypher/alpha-leaks-demo
• https://github.com/nucypher/nucypher-ts-demo
• https://github.com/nucypher/nucypher-ts-demo-tdec
• https://github.com/nucypher/tdec-sandbox
• https://github.com/nucypher/tdec-nft-example

We're considering moving demos to nucypher-ts repository under ./demos directory.

We also (are going to) have the following integration examples:

• https://github.com/piotr-roslaniec/nucypher-ts/tree/refactor-packages/examples (awaiting Refactor packages APIs #301 merge)

CC @arjunhassard