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

client/src/rpc_config.rs

@@ -1,3 +1,4 @@
+use solana_account_decoder::UiAccountEncoding;
 use solana_sdk::{clock::Epoch, commitment_config::CommitmentConfig};
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
@@ -40,3 +41,11 @@ pub struct RpcInflationConfig {
     #[serde(flatten)]
     pub commitment: Option<CommitmentConfig>,
 }
+
+#[derive(Debug, Clone, Default, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RpcAccountInfoConfig {
+    pub encoding: Option<UiAccountEncoding>,
+    #[serde(flatten)]
+    pub commitment: Option<CommitmentConfig>,
+}