Cardano Updates

Eliminate the legacy 'TxOut CtxTx era' and 'TxOut CtxUTxO era' type
signatures and pattern matches from cardano-cli's non-Byron code paths.
Byron-era code uses a separate pre-Shelley tx output model and is left
alone — 'Exp.TxOut' is not applicable there.

  * 'friendlyTxOut' in 'Compatible/Json/Friendly.hs' now takes
    'Exp.TxOut (LedgerEra era)' and reads address, value, datum, and
    reference script directly via the ledger lenses ('addrTxOutL',
    'valueTxOutL', 'datumTxOutL', 'referenceScriptTxOutL'). The two
    call sites ('basePairs', 'friendlyReturnCollateral') wrap the
    body's ledger outputs with 'Exp.TxOut' instead of going through
    'fromShelleyTxOut → fromCtxUTxOTxOut'. The dead 'friendlyTxOutValue'
    helper is dropped.

  * 'filteredUTxOsToText' in 'EraBased/Query/Run.hs' now takes a
    'ShelleyBasedEra era' witness, converts the api 'UTxO era' to the
    ledger UTxO once via 'toLedgerUTxO', then renders each entry from
    '(TxIn, Exp.TxOut (ShelleyLedgerEra era))' using ledger lenses.
    The pre-Babbage datum slot has no uniform ledger representation,
    so the renderer emits an empty placeholder there and shows the
    babbage+ ledger datum elsewhere — debug-style output, no golden
    tests touched.

  * Removed 'validateTxReturnCollateral' from
    'Type/Error/TxValidationError.hs'. It was exported but never
    called outside its own module; the actual return-collateral
    construction in 'EraBased/Transaction/Run' builds
    'Exp.TxReturnCollateral' directly.

Remaining uses of legacy ctx-typed tx outputs in cardano-cli are
confined to Byron-only modules.

Adapt to cardano-api PR #1209, which removes the legacy 'TxOut CtxTx era'
from the Compatible and Experimental APIs:

  * 'createCompatibleTx' now takes '[Exp.TxOut (ShelleyLedgerEra era)]'
    plus a new 'Map L.DataHash (L.Data ...)' argument carrying any
    supplemental datum bodies. The legacy 'TxOut CtxTx era' bundled
    supplemental datums inside outputs; 'Exp.TxOut' only carries the
    datum hash, so callers thread the full datum bodies in explicitly.
  * The bridge helpers 'fromLegacyTxOut', 'legacyDatumToDatum',
    'supplementalDatumFromLegacy', 'toLedgerDatum', and the
    'DatumDecodingError' type are deleted from 'Cardano.Api.Experimental.Tx'.

Migration:

  * 'mkTxOut' and 'toTxOutInAnyEra' now return
    '(Exp.TxOut (ShelleyLedgerEra era), Map DataHash (L.Data ...))'
    directly, building the legacy 'TxOut CtxTx era' internally only as
    a stepping stone for 'toShelleyTxOutAny'.
  * 'createCompatibleTx' call site in 'Compatible/Transaction/Run.hs'
    folds the per-output supplemental datums via 'Map.unions' and
    passes them as the new argument.
  * 'toTxOutInEra' and 'toTxOutInShelleyBasedEra' in
    'EraBased/Transaction/Run.hs' delegate directly to 'mkTxOut' (the
    deleted 'fromLegacyTxOut' is gone).
  * 'TxCmdDatumDecodingError' is removed since the underlying
    'Exp.DatumDecodingError' is gone and the new conversion is total.

Temporary 'cabal.project' additions (to be removed once #1209 is
merged and the next cardano-api is published to CHaP):

  * 'source-repository-package' pointing at the PR branch so CI can
    build against the unpublished API.
  * Per-package '-Wwarn=deprecations -Wwarn=unused-imports' for
    cardano-cli. The PR branch is several commits ahead of
    cardano-api-11.1.0.0 and surfaces unrelated TxBody/TxBodyContent
    deprecations (cardano-api PR #1200) plus a redundant
    'Cardano.Ledger.Core' import in 'Cardano.CLI.Read' that became
    visible after upstream re-exports widened. Both are separate
    cleanups out of scope for this PR.