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/setup_client_custom_config.rs

@@ -0,0 +1,30 @@
+use subxt::{
+    config::{substrate::SubstrateExtrinsicParams, Config, SubstrateConfig},
+    OnlineClient,
+};
+
+/// Define a custom config type (see the `subxt::config::Config` docs for
+/// more information about each type):
+enum MyConfig {}
+impl Config for MyConfig {
+    // This is different from the default `u32`:
+    type Index = u64;
+    // We can point to the default types if we don't need to change things:
+    type Hash = <SubstrateConfig as Config>::Hash;
+    type Hasher = <SubstrateConfig as Config>::Hasher;
+    type Header = <SubstrateConfig as Config>::Header;
+    type AccountId = <SubstrateConfig as Config>::AccountId;
+    type Address = <SubstrateConfig as Config>::Address;
+    type Signature = <SubstrateConfig as Config>::Signature;
+    // ExtrinsicParams makes use of the index type, so we need to tweak it
+    // too to align with our modified index type, above:
+    type ExtrinsicParams = SubstrateExtrinsicParams<Self>;
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Create a client which uses the custom config:
+    let _api = OnlineClient::<MyConfig>::new().await?;
+
+    Ok(())
+}