Move Subxt crate into a subfolder (#424)

* move into subfolder step 1

* Make folders a workspace again

* Move examples into their own workspace crate to make them more visible and easier to run

* clippy fix

* newline

* tweak releasing steps for folder move

* reference exampels more clearly in top level readme

examples/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "subxt-examples"
+version = "0.16.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2021"
+publish = false
+
+license = "GPL-3.0"
+repository = "https://github.com/paritytech/subxt"
+documentation = "https://docs.rs/subxt"
+homepage = "https://www.parity.io/"
+description = "Subxt example usage"
+
+[dev-dependencies]
+subxt = { path = "../subxt" }
+async-std = { version = "1.9.0", features = ["attributes", "tokio1"] }
+sp-keyring = "4.0.0"
+env_logger = "0.9.0"
+futures = "0.3.13"
+codec = { package = "parity-scale-codec", version = "2", default-features = false, features = ["derive", "full", "bit-vec"] }
+hex = "0.4.3"