new crate sc-light (#6235)

* sc-light

* remove unused deps

* fix line width

* move more fns to sc_light

substrate/Cargo.lock

@@ -6337,6 +6337,24 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "sc-light"
+version = "2.0.0-rc3"
+dependencies = [
+ "hash-db",
+ "lazy_static",
+ "parity-scale-codec",
+ "parking_lot 0.10.2",
+ "sc-client-api",
+ "sc-executor",
+ "sp-api",
+ "sp-blockchain",
+ "sp-core",
+ "sp-externalities",
+ "sp-runtime",
+ "sp-state-machine",
+]
+
 [[package]]
 name = "sc-network"
 version = "0.8.0-rc3"
@@ -6613,6 +6631,7 @@ dependencies = [
  "sc-finality-grandpa",
  "sc-informant",
  "sc-keystore",
+ "sc-light",
  "sc-network",
  "sc-offchain",
  "sc-rpc",
@@ -6663,6 +6682,7 @@ dependencies = [
  "sc-client-api",
  "sc-client-db",
  "sc-executor",
+ "sc-light",
  "sc-network",
  "sc-service",
  "sp-api",
@@ -8069,6 +8089,7 @@ dependencies = [
  "sc-client-db",
  "sc-consensus",
  "sc-executor",
+ "sc-light",
  "sc-service",
  "sp-blockchain",
  "sp-consensus",
@@ -8130,6 +8151,7 @@ dependencies = [
  "sc-block-builder",
  "sc-client-api",
  "sc-consensus",
+ "sc-light",
  "sc-service",
  "sp-api",
  "sp-blockchain",