Revive Substrate Crate (#1477)

Closes https://github.com/paritytech/polkadot-sdk/issues/1450

Bringing back the Substrate crate that was forgotten in the monorepo
import 😅.
It is a doc-only crate. Version number is set to `1.0.0` and publishing
is enabled (so that we can link to docs.rs).

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

Cargo.lock

@@ -17663,6 +17663,25 @@ dependencies = [
  "sc-cli",
 ]
 
+[[package]]
+name = "substrate"
+version = "1.0.0"
+dependencies = [
+ "aquamarine",
+ "chain-spec-builder",
+ "frame-support",
+ "sc-cli",
+ "sc-consensus-aura",
+ "sc-consensus-babe",
+ "sc-consensus-beefy",
+ "sc-consensus-grandpa",
+ "sc-consensus-manual-seal",
+ "sc-consensus-pow",
+ "sc-service",
+ "sp-runtime",
+ "subkey",
+]
+
 [[package]]
 name = "substrate-bip39"
 version = "0.4.4"