Feature/bridge activity card

[Oxbobby]

Changes:

• add an SubmittedAccountOpLike interface that accepts the minimum properties needed to display successfully a transaction in the activity tab
• add an externalAccountOps object in storage
• when a bridge completes, add that transaction as an externalAccountOp for that account
• mix internal & external account ops in the activity so they are visible to the user
• move debug_traceTransaction to its own declaration