Support signed declare transaction

[cptartur]

Describe your changes

This PR adds support for signing declare transactions and sending them.

Linked issues

Closes #145

Breaking changes

• This issue contains breaking changes

[cptartur]

Thing to consider: with current supported version of the RPC spec, it's impossible to send signed declare transactions. Starknet-jvm will first have to be updated to support RPC 0.2.0 for these to be able to work.

[codecov-commenter]

Codecov Report

Base: 66.42% // Head: 68.22% // Increases project coverage by +1.80% 🎉

Coverage data is based on head (1c39d01) compared to base (5b56293).
Patch coverage: 92.45% of modified lines in pull request are covered.

❗ Current head 1c39d01 differs from pull request most recent head 0a3c1a2. Consider uploading reports for the commit 0a3c1a2 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #149      +/-   ##
==========================================
+ Coverage   66.42%   68.22%   +1.80%     
==========================================
  Files          52       52              
  Lines        1382     1432      +50     
  Branches       83       85       +2     
==========================================
+ Hits          918      977      +59     
+ Misses        440      430      -10     
- Partials       24       25       +1     

Impacted Files	Coverage Δ
...n/kotlin/com/swmansion/starknet/account/Account.kt	100.00% <ø> (ø)
...swmansion/starknet/provider/rpc/JsonRpcProvider.kt	77.69% <0.00%> (-1.22%)	⬇️
...on/starknet/data/types/transactions/Transaction.kt	73.62% <92.85%> (+11.69%)	⬆️
.../com/swmansion/starknet/account/StandardAccount.kt	100.00% <100.00%> (ø)
...mansion/starknet/data/TransactionHashCalculator.kt	100.00% <100.00%> (ø)
...lin/com/swmansion/starknet/data/types/Contracts.kt	42.39% <100.00%> (+0.63%)	⬆️
...knet/data/types/transactions/TransactionPayload.kt	100.00% <100.00%> (ø)
...nsion/starknet/provider/gateway/GatewayProvider.kt	89.86% <100.00%> (ø)
...tlin/com/swmansion/starknet/crypto/NativeLoader.kt	29.03% <0.00%> (ø)
...knet/data/types/transactions/TransactionReceipt.kt	16.81% <0.00%> (ø)
... and 1 more

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[cptartur]

Note that the Rpc provider doesn't support sending signed Declare txs. I've added an error for that so it doesn't fail silently/is ignored. This will have to be addressed once rpc 0.2.1 is supported, shouldn't require any changes to the Account itself however.

[THenry14]

lgtm!