Add account-decoder utilities (#10846)

* Fix comment and make less pub

* Add account-decoder crate and use to decode vote and system (nonce) accounts

* Update docs

* Rename RpcAccount struct

* s/Rpc/Display

* Call it jsonParsed and update docs

* Revert "s/Rpc/Display"

This reverts commit 6e7149f503.

* s/Rpc/Ui

* Add tests

* Ui more things

* Comments

transaction-status/src/lib.rs

@@ -23,7 +23,7 @@ pub enum RpcInstruction {
     Parsed(Value),
 }
 
-/// A duplicate representation of a Message for pretty JSON serialization
+/// A duplicate representation of a CompiledInstruction for pretty JSON serialization
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct RpcCompiledInstruction {