* no-std tests and porting of subxt-metadata
* update pipeline
* fix generate custom metadata test
* fix cargo run command
* adjust pipeline
* remove prelude from subxt-metadata
* revert autoformatting of Cargo.toml
* remove alloc::format! again, still causes linker errors
* add no-std-build for thumbv7em-none-eabi target
* remove std feature flag
* remove libc and add small readme with test instructions
* change ci for nightly no std
* work in progress
* add custom types access
* nit
* custom values client
* adjust light client
* adjust doc comments
* adjust book for custom values in code gen
* format and check docs
* work in progress
* add custom types access
* nit
* custom values client
* adjust light client
* codegen and validation
* adjust docs
* use ignore in docs in book
* change iter implementation
* use validation hash and other codegen changes
* add ui test for custom values codegen
* allow 'latest' metadata to be returned from the fallback code (#1127)
* nits
* fix validation check
* fix comments
* nits
---------
Co-authored-by: James Wilson <james@jsdw.me>
* 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()
wgyt