PlutusData cardano-node JSON encoding/decoding (#277)

* Bring over json_serialize.rs + plutus json code from old CML

* PlutusData cardano-node JSON encoding/decoding

Brought over from old CML's code. JSON parsing code is brought over as
well to new format.

PlutusData::BigInt -> PlutusData::Integer rename to match old CML's API
as the big part probably isn't particularly important

* PlutusData JSON wasm bindings

* fix clippy in tests

chain/rust/Cargo.toml

@@ -29,6 +29,7 @@ num-integer = "0.1.45"
 #rand_os = "0.1"
 thiserror = "1.0.37"
 num = "0.4"
+unicode-segmentation = "1.10.1"
 # These can be removed if we make wasm bindings for ALL functionality here.
 # This was not done right now as there is a lot of existing legacy code e.g.
 # for Byron that might need to be used from WASM and might not.

chain/rust/src/builders/redeemer_builder.rs

@@ -330,7 +330,7 @@ mod tests {
                 let script = PlutusScript::PlutusV1(PlutusV1Script::new(vec![0]));
                 PartialPlutusWitness {
                     script: PlutusScriptWitness::Script(script),
-                    redeemer: PlutusData::new_big_int(0u64.into()),
+                    redeemer: PlutusData::new_integer(0u64.into()),
                 }
             };
             let missing_signers = vec![fake_raw_key_public(0).hash()];

chain/rust/src/builders/witness_builder.rs

@@ -624,7 +624,7 @@ mod tests {
                 let script = PlutusScript::PlutusV1(PlutusV1Script::new(vec![0]));
                 PartialPlutusWitness {
                     script: PlutusScriptWitness::Script(script),
-                    redeemer: PlutusData::new_big_int(0u64.into()),
+                    redeemer: PlutusData::new_integer(0u64.into()),
                 }
             };
             let missing_signers = vec![fake_raw_key_public(0).hash()];
@@ -648,7 +648,7 @@ mod tests {
                 let script = PlutusScript::PlutusV1(PlutusV1Script::new(vec![0]));
                 PartialPlutusWitness {
                     script: PlutusScriptWitness::Script(script),
-                    redeemer: PlutusData::new_big_int(0u64.into()),
+                    redeemer: PlutusData::new_integer(0u64.into()),
                 }
             };
             let missing_signers = vec![hash];