Add Working with Multisig section to the cookbook

[Dhanraj30]

What

adds a new section titled "Working with Multisig" to the Stellar cookbook. It includes instructions for creating multisig accounts and signing transactions on the Stellar ledger.

Why

there are no entries in the cookbook on how to work with multisig accounts. This feature is essential for users who want to implement enhanced security measures by requiring multiple signatures for transaction approvals

Known limitations

This section focuses solely on creating multisig accounts and signing transactions. Additional features related to multisig functionality may be addressed in future updates. Users should ensure they have the necessary signer keys and understand the implications of the threshold settings before proceeding.

[willemneal]

Were you able to walk through the steps and reproduce it yourself? It seems like commands that sounded right were used, but never tested.