* Add and use subxt-signer crate for WASM compatible signing
* cargo fmt
* dev keypairs already references
* WIP fix various breakages
* re-jig features to be simpler and various test fixes etc
* doc and web fix
* fix various bits and pieces
* fix a test I broke
* dev-deps can't be linked to in docs, hrmph
* cargo fmt
* another doc link
* document the subxt_signer crate more thoroughly
* move feature flag for consistency
* more docs, no default subxt feature flag on signer, update release instrs
* Add missing license header
* unwrap_inner => into_inner
* extend a test a little to better check derive junctions
* note more clearly that the crypto bits come from sp_core::crypto
* WIP new Metadata type
* Finish basic Metadata impl inc hashing and validation
* remove caching from metadata; can add that higher up
* remove caches
* update retain to use Metadata
* clippy fixes
* update codegen to use Metadata
* clippy
* WIP fixing subxt lib
* WIP fixing tests, rebuild artifacts, fix OrderedMap::retain
* get --all-targets compiling
* move DispatchError type lookup back to being optional
* cargo clippy
* fix docs
* re-use VariantIndex to get variants
* add docs and enforce docs on metadata crate
* fix docs
* add test and fix docs
* cargo fmt
* address review comments
* update lockfiles
* ExactSizeIter so we can ask for len() of things (and hopefully soon is_empty()
* Move all deps to workspace toml
* cargo fmt and codec 3.4, removing now unneeded 'full' feature
* add wasm-tests to workspace and fix subxt inheritng
* cargo fmt
* wasm-test thing can't be in workspace so revert that
* remove unwanted target dir from wasm-tests
Alexandru Vasile