Update all SDKs and Providers to Spec v0.18.1

[Mercurial]

Update SDKs and Providers to v0.18.1

Master tracking issue for updating all UTxO RPC SDKs and providers to spec version 0.18.1.

Core SDKs

• node-sdk - #Feature Support Tracking: UTxO RPC Spec v0.18.1 node-sdk#51
• rust-sdk - #Feature Support Tracking: UTxO RPC Spec v0.18.1 rust-sdk#33
• python-sdk - #Feature Support Tracking: UTxO RPC Spec v0.18.1 python-sdk#6
• dotnet-sdk - #Feature Support Tracking: UTxO RPC Spec v0.18.1 dotnet-sdk#36
• haskell-sdk - #Feature Support Tracking: UTxO RPC Spec v0.18.1 haskell-sdk#8

Providers (Need spec bump to 0.18.1)

• blaze-provider - #Update to UTxO RPC Spec v0.18.1 blaze-provider#40
• lucid-evolution-provider - #Update to UTxO RPC Spec v0.18.1 lucid-evolution-provider#29

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Breaking Changes in 0.18.1

1. Single TX submission - SubmitTx takes single tx instead of repeated
2. BigInt for amounts - Lovelace and asset amounts use BigInt
3. idle action - New action type in WatchTxResponse for block progress signals

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Feature Matrix

Feature	node	rust	python	dotnet	haskell
Spec 0.18.1	✅	✅	✅	✅	✅
idle handling	❌	✅*	✅	✅	✅
EvalTx	✅	❌	❌	❌	❌
ReadData	❌	❌	❌	❌	❌
ReadTx	❌	✅	❌	❌	❌
ReadMempool	❌	❌	❌	❌	✅
ReadGenesis	✅	✅	❌	✅	✅
ReadEraSummary	✅	✅	❌	✅	✅

*rust-sdk idle handling added in PR #32