feat(erc721): implement erc-721 token standard #84

	name: no-std
	# This workflow checks whether the library is able to run without the std
	# library. See `check.yml` for information about how the concurrency
	# cancellation and workflow triggering works.
	permissions:
	contents: read
	on:
	push:
	branches: [main]
	pull_request:
	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true
	env:
	CARGO_TERM_COLOR: always
	jobs:
	nostd:
	runs-on: ubuntu-latest
	name: ${{ matrix.target }}
	strategy:
	matrix:
	target: [wasm32-unknown-unknown]
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	- name: Install stable
	uses: dtolnay/rust-toolchain@stable
	- name: rustup target add ${{ matrix.target }}
	run: rustup target add ${{ matrix.target }}
	- name: cargo check
	run: cargo check --release --target ${{ matrix.target }} --no-default-features --workspace --all-features

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