[Feature] Add helpers for PrivateTransactionRequest

[mattsse]

Component

rpc

Describe the feature you would like

alloy/crates/rpc-types-mev/src/eth_calls.rs

Lines 299 to 312 in ae7c342

	/// Request for `eth_sendPrivateTransaction`
	#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
	#[serde(rename_all = "camelCase")]
	pub struct PrivateTransactionRequest {
	/// raw signed transaction
	pub tx: Bytes,
	/// Hex-encoded number string, optional. Highest block number in which the transaction should
	/// be included.
	#[serde(default, with = "alloy_serde::quantity::opt", skip_serializing_if = "Option::is_none")]
	pub max_block_number: Option<u64>,
	/// Preferences for private transaction.
	#[serde(default, skip_serializing_if = "PrivateTransactionPreferences::is_empty")]
	pub preferences: PrivateTransactionPreferences,
	}

for this type we could use some helper functions, like

fn from_tx<T:Encodable2718>

and builder style fns for setting the additional fields

Additional context

No response

[nadtech-hub]

I would like to work on this