Add FromJSON instance for new experimental TxOut

[Jimbo4350]

Context

Implements FromJSON instances for the new TxOut era type (which wraps L.TxOut era) in the experimental API, matching the JSON format produced by the ToJSON instances added in #1176.

Closes #926

Changelog

- description: |
    Add FromJSON instance for new experimental TxOut type with per-era
    concrete instances, inline datum parsing from inlineDatumRaw with
    hash validation, and reference script support via scriptInAnyLangToLedgerScript
  type:
   - feature
  projects:
   - cardano-api

How to trust this PR

• Concrete FromJSON instances for each era (Shelley through Conway), mirroring the ToJSON structure from Add ToJSON instance for new experimental TxOut #1176
• Pre-Alonzo eras parse address and value only via shared txOutBaseParseJson helper
• Alonzo adds datum hash parsing via dataHashTxOutL
• Babbage+ adds inline datum parsing from inlineDatumRaw (hex-encoded original CBOR bytes) with hash validation against inlineDatumhash, and reference script parsing via scriptInAnyLangToLedgerScript
• Supplemental datums deliberately unsupported — the ledger TxOut does not carry them
• Helper functions: addrFromJson (reverse of addrToJson), scriptInAnyLangToLedgerScript (reverse of ledgerScriptToScriptInAnyLang)
• Property test verifies JSON round-trip (fromJSON . toJSON = id) across all Shelley-based eras

Checklist

• Commit sequence is logical and each commit has a good commit message
• New tests are added if needed and old tests still pass
• Code is formatted with fourmolu
• Self-reviewed the diff