move examples to main repo so we can include_str them for publishing (#993)

* move exampels to main repo so we can include_str them for publishing

* update CI to not break examples

subxt/examples/tx_with_params.rs

@@ -0,0 +1,28 @@
+use sp_keyring::AccountKeyring;
+use subxt::config::polkadot::{Era, PlainTip, PolkadotExtrinsicParamsBuilder as Params};
+use subxt::{tx::PairSigner, OnlineClient, PolkadotConfig};
+
+#[subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
+pub mod polkadot {}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Create a new API client, configured to talk to Polkadot nodes.
+    let api = OnlineClient::<PolkadotConfig>::new().await?;
+
+    // Build a balance transfer extrinsic.
+    let dest = AccountKeyring::Bob.to_account_id().into();
+    let tx = polkadot::tx().balances().transfer(dest, 10_000);
+
+    // Configure the transaction parameters; for Polkadot the tip and era:
+    let tx_params = Params::new()
+        .tip(PlainTip::new(1_000))
+        .era(Era::Immortal, api.genesis_hash());
+
+    // submit the transaction:
+    let from = PairSigner::new(AccountKeyring::Alice.pair());
+    let hash = api.tx().sign_and_submit(&tx, &from, tx_params).await?;
+    println!("Balance transfer extrinsic submitted with hash : {hash}");
+
+    Ok(())
+}