(WIP)feat: json-rpc 2.0 faucet api

[alexiscolin]

Update Faucet API to JSON-RPC 2.0 Standard

Changes

• Created new useFaucetApi composable to handle JSON-RPC 2.0 communication and separate API from store
• Added amount.ts utility for ugnot conversions.
• Updated faucet requests to follow JSON-RPC 2.0 format
• Improved error handling for API responses

JSON-RPC 2.0 Format

Folowwing gnolang/gno#4303 requirements, requests now follow the standard format:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "drip",
  "params": [
    "g1e6gxg5tvc55mwsn7t7dymmlasratv7mkv0rap2",
    "1000ugnot"
  ]
}

Response Handling

• Text responses are treated as HTTP errors
• JSON responses are parsed as JSON-RPC 2.0 objects
• Proper error handling for both HTTP and JSON-RPC errors

Code Organization

• Separated API communication logic into useFaucetApi composable
• Created pure utility functions for amount conversions in amount.ts
• Maintained UI state management in the store

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[zivkovicmilos]

I tested it out locally, works great 💯