Cardano Updates

Add `TxBuilder.addMint({ policy, assets, redeemer })` so consumers can mint or
burn assets under a policy without dropping to the lower-level `initializeTx`.
The policy script is attached to the witness set, the asset quantities are added
to the body, and (for Plutus policies) the redeemer is included and its execution
units evaluated during `build()`. Previously `GenericTxBuilder` had no minting
support — `mint` was never forwarded to `initializeTx`.

This also fixes redeemer index reconciliation for non-spend purposes: builder
redeemers are stamped with a sentinel index by `buildRedeemers`, but
`reorgRedeemers` only reindexed spend redeemers, so mint/withdrawal/certificate
redeemers reached `updateRedeemers` with an index the evaluator could not match.
Sentinel-indexed non-spend redeemers are now reindexed by their position within
their purpose; redeemers that already carry a concrete index are left untouched.

Coverage: unit tests for plutus mint, burn (negative quantity), native-script
mint without a redeemer, and multi-policy redeemer reindexing; plus an e2e test
that mints through the builder and submits. The `web-extension` remote-api
property map gains the new method.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

Derive canonical redeemer indices from the sorted transaction-body collections
instead of insertion order (review feedback). Keys mint by PolicyId, withdrawal
by RewardAccount and vote by Voter; certificate/propose keep their body-order
index. Replaces reindexSentinelRedeemers.

Add `TxBuilder.addMint({ policy, assets, redeemer })` so consumers can mint or
burn assets under a policy without dropping to the lower-level `initializeTx`.
The policy script is attached to the witness set, the asset quantities are added
to the body, and (for Plutus policies) the redeemer is included and its execution
units evaluated during `build()`. Previously `GenericTxBuilder` had no minting
support — `mint` was never forwarded to `initializeTx`.

This also fixes redeemer index reconciliation for non-spend purposes: builder
redeemers are stamped with a sentinel index by `buildRedeemers`, but
`reorgRedeemers` only reindexed spend redeemers, so mint/withdrawal/certificate
redeemers reached `updateRedeemers` with an index the evaluator could not match.
Sentinel-indexed non-spend redeemers are now reindexed by their position within
their purpose; redeemers that already carry a concrete index are left untouched.

Coverage: unit tests for plutus mint, burn (negative quantity), native-script
mint without a redeemer, and multi-policy redeemer reindexing; plus an e2e test
that mints through the builder and submits. The `web-extension` remote-api
property map gains the new method.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

Add `TxBuilder.addMint({ policy, assets, redeemer })` so consumers can mint or
burn assets under a policy without dropping to the lower-level `initializeTx`.
The policy script is attached to the witness set, the asset quantities are added
to the body, and (for Plutus policies) the redeemer is included and its execution
units evaluated during `build()`. Previously `GenericTxBuilder` had no minting
support — `mint` was never forwarded to `initializeTx`.

This also fixes redeemer index reconciliation for non-spend purposes: builder
redeemers are stamped with a sentinel index by `buildRedeemers`, but
`reorgRedeemers` only reindexed spend redeemers, so mint/withdrawal/certificate
redeemers reached `updateRedeemers` with an index the evaluator could not match.
Sentinel-indexed non-spend redeemers are now reindexed by their position within
their purpose; redeemers that already carry a concrete index are left untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

buildRedeemers, buildWitness and computeCollateral are defined in
tx-builder/utils.ts but the tx-builder barrel never re-exported them, so
they were absent from the package's public API. Consumers assembling Plutus
transactions manually (mint / script-spend / withdrawal redeemers,
collateral) had to reimplement buildRedeemers and could not use
computeCollateral. Re-export ./utils from the barrel to expose them.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

feat(core): opt-in strict CBOR deserialization mode