Make subxt-core ready for publishing (#1508)

* Move Extrinsic decoding things to subxt_core and various tidy-ups

* A couple more fixes and fmt

* first pass moving tx logic to subxt_core

* cargo fmt

* fix wasm example

* clippy

* more clippy

* WIP Adding examples and such

* Move storage functionality more fully to subxt_core and nice examples for storage and txs

* Add example for events

* consistify how addresses/payloads are exposed in subxt-core and add runtime API fns

* Add runtime API core example

* fmt

* remove scale-info patch

* Add a little to the top level docs

* swap args around

* clippy

* cargo fmt and fix wasm-example

* doc fixes

* no-std-ise new subxt-core additions

* alloc, not core

* more no-std fixes

* A couple more fixes

* Add back extrinsic decode test

signer/src/ecdsa.rs

@@ -283,7 +283,7 @@ mod subxt_compat {
     use super::*;
 
     use subxt_core::config::Config;
-    use subxt_core::tx::Signer as SignerT;
+    use subxt_core::tx::signer::Signer as SignerT;
     use subxt_core::utils::{AccountId32, MultiAddress, MultiSignature};
 
     impl From<Signature> for MultiSignature {

signer/src/sr25519.rs

@@ -259,7 +259,7 @@ mod subxt_compat {
     use super::*;
 
     use subxt_core::{
-        tx::Signer as SignerT,
+        tx::signer::Signer as SignerT,
         utils::{AccountId32, MultiAddress, MultiSignature},
         Config,
     };