* TransactionExtensions basic support for V5 VerifySignature and renames
* WIP: subxt-core v5 transaction support
* Subxt to support V5 extrinsics
* WIP tests failing with wsm trap error
* Actually encode mortality to fix tx encode issue
* fmt
* rename to sign_with_account_and_signature
* Add explicit methods for v4 and v5 ext construction
* clippy
* fix wasm example and no mut self where not needed
* fix doc example
* another doc fix
* Add tests for tx encoding and fix v5 encode issue
* add copyright and todo
* refactor APIs to have clear v4/v5 split in core and slightly nicer split in subxt proper
* rename Partial/SubmittableExtrinsic to *Transaction
* Remove SignerT::address since it's not needed
* doc fixes
* fmt
* doc fixes
* Fix comment number
* Clarify panic behaviour of inject_signature
* fmt
* 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
* WIP backend trait
* WIP converting higher level stuff to using Backend impl
* more implementing new backend trait, mainly storage focused
* Get core code compiling with new backend bits
* subxt crate checks passing
* fix tests
* cargo fmt
* clippy/fixes
* merging and other fixes
* fix test
* fix lightclient code
* Fix some broken doc links
* another book link fix
* fix broken test when moving default_rpc_client
* fix dry_run test
* fix more tests; lightclient and wasm
* fix wasm tests
* fix some doc examples
* use next() instead of next_item()
* missing next_item() -> next()s
* move legacy RPc methods to LegacyRpcMethods type to host generic param instead of RpcClient
* standardise on all RpcClient types prefixed with Rpc, and 'raw' trait types prefixed with RawRpc so it's less ocnfusing which is which
* rename fixes
* doc fixes
* Add back system_dryRun RPC method and rename tx.dry_run() to tx.validate(), to signal that the calls are different
* Add a test that we return the correct extrinsic hash from submit()
* add TransactionValid details back, and protect against out of range bytes
* add test for decoding transaction validation from empty bytes
* fix clippy warning
James Wilson