[Task]: Show the storage amount taken by a data field

### Task description

> A tiny feature that can be helpful in the Explorer is showing the storage taken by a data field (metadata, stateMetadata, etc.) of an Output. For instance State Metadata (200 bytes) or State Metadata (1.2 Kbytes)

### Requirements

N/A

### Acceptance criteria

N/A

### Creation checklist

- [X] I have assigned this task to the correct people
- [X] I have added the most appropriate labels
- [X] I have linked the correct milestone and/or project