ABI: Add encoding and decoding capability

[brunomenezes]

📄 Context

Input data can be encoded or decoded based on standard and non-standard ABI. We have this feature available currently on CartesiScan, and it's called Specification.

✔️ Solution

Port the Specification feature from Cartesiscan to the Dave application. That means:

• Add pages for listing, creating, and editing specifications.
• Adapt the feature to use the Specification to decode known inputs and voucher outputs.

📈 Subtasks

• Port Specification feature.
• Add ABI decoding for inputs from Portals.
• Add ABI decoding of voucher content.

🎯 Definition of Done

• I can list a specification.
• I can create/edit a specification.
• I can delete a specification.
• I can export/import all specifications.
• I can see the input from portals decoded.
• I can see voucher outputs decoded.