Document how to tx execute

[firelizzard18]

accumulate tx execute <principal> <signer> <payload>

<payload> is a JSON-formatted transaction. repeatable: true means the property can be multi-valued (can be an array).

• Transactions: https://gitlab.com/accumulatenetwork/accumulate/-/blob/main/protocol/user_transactions.yml
• General types: https://gitlab.com/accumulatenetwork/accumulate/-/blob/main/protocol/general.yml
• UpdateAccountAuth operations: https://gitlab.com/accumulatenetwork/accumulate/-/blob/main/protocol/account_auth_operations.yml
• UpdateKeyPage operations: https://gitlab.com/accumulatenetwork/accumulate/-/blob/main/protocol/key_page_operations.yml

Shortcuts

• The payload is actually parsed as YAML which allows a number of convenient shortcuts like omitting quotes if the datatype of a value is unambiguous.
• Array braces ([ and ]) can be omitted when the array contains exactly one entry.