chore: Update default cost model during Conway HF

[satran004]

• Conway Era optional serialization changes (258 tag for set, Redeemers as Map).
• Introduced UniqueList to avoid duplicates where required. We need our custom List implementation for backward compatibility, but later we can change fields like TransactionBody.inputs, TransactionBody.referenceInputs, etc., to Set.
• Adjusted test cases.
• V3 cost model and language view calculation.
• Transactions with PlutusV1 scripts still use the pre-Conway Era format due to the script data hash issue. All other transactions (V2, V3) use the Conway Era as the default serialization format.