docs: configure spell check, minor improvements #17107

Job	Run time
build-forc-doc-sway-lib-std	5m 42s
build-forc-test-project	10m 43s
build-mdbook	10m 31s
build-reference-examples	3m 53s
build-sway-examples	3m 49s
build-sway-lib-core	3m 37s
build-sway-lib-std	3m 54s
cargo-build-workspace	8m 15s
cargo-clippy	4m 33s
cargo-fmt-check	15s
cargo-run-e2e-test	19m 14s
cargo-run-e2e-test-evm	8m 29s
cargo-run-e2e-test-midenvm	8m 42s
cargo-test-lib-std	5m 9s
cargo-test-workspace	27m 3s
cargo-toml-fmt-check	30s
cargo-unused-deps-check	9m 54s
forc-fmt-check-panic	4m 13s
forc-fmt-check-sway-examples	3m 39s
forc-pkg-fuels-deps-check	37s
forc-unit-tests	4m 9s
forc-run-benchmarks	5m 6s
pre-publish-check	0s
notify-slack-on-failure	1s
build-publish-master-image	0s
publish	0s
build-publish-release-image	0s
Build and upload forc binaries to release	0s
	2h 31m 58s

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