Add Westend & Rococo primitives (#808)

* Move chain primitives to a sub-folder.

* Update workspace members.

* Extract core parts of polkadot.

* cargo fmt --all

* Remove TODO.

* cargo fmt --all

* Fix crate names.

* Add to the latest API.

* cargo fmt --all

* Add nested lock files to ignore (generated during cargo fmt)

* Fix compilation.

* cargo fmt --all

* Fix ignore pattern.

* Address review comments.

bridges/primitives/chains/kusama/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "bp-kusama"
+description = "Primitives of Kusama runtime."
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2018"
+license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
+
+[dependencies]
+
+# Bridge Dependencies
+bp-message-lane = { path = "../../message-lane", default-features = false }
+bp-polkadot-core = { path = "../../polkadot-core", default-features = false }
+bp-runtime = { path = "../../runtime", default-features = false }
+
+# Substrate Based Dependencies
+sp-api = { git = "https://github.com/paritytech/substrate", branch = "master" , default-features = false }
+sp-std = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
+
+[features]
+default = ["std"]
+std = [
+	"bp-message-lane/std",
+	"bp-polkadot-core/std",
+	"bp-runtime/std",
+	"sp-api/std",
+	"sp-std/std",
+]