Example: How to connect to parachain (#1043)

* parachain rpc lists

* guide almost done

* add the 3rd config

* subscribe to block with configs

* delete table file

* spaces instead of tabs

* remove original ajuna example

* zombienet setup

* nft minting example

* include port, use different names

* link the example from the book

* format book

* add config creation to book, simplify example structure

* fix the nft creation script

* fix doc ref

* fixing links to foreign crates

* fix table formatting

* include nits

* move more docs to book, and simplify parachain-example

* another pass over docs and link to exampels from guide

* nit: adjust comment to numbers

* teeny README fix for parachain-example

* fix command in readme

* add CI for examples and fix parachain-example bug I left in

* add target arch

* cargo fmt

* make CI not fail

* remove index from docs

---------

Co-authored-by: James Wilson <james@jsdw.me>

examples/parachain-example/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "parachain-example"
+version = "0.1.0"
+edition = "2021"
+
+[workspace]
+
+[dependencies]
+subxt = { path = "../../subxt" }
+subxt-signer = { path = "../../signer", features = ["subxt"] }
+futures = { version = "0.3.27", default-features = false, features = ["std"] }
+tokio = { version = "1.28", features = ["macros", "time", "rt-multi-thread"] }
+sp-core = "21.0.0"
+sp-runtime = "24.0.0"
+codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
+scale-decode = "0.7.0"
+scale-encode = "0.3.0"