Improve document symbol hierarchy to match rust-analyzer layout #22590

Job	Run time
build-sway-lib-core	59s
get-fuel-core-version	36s
build-reference-examples	1m 9s
build-sway-examples	1m 8s
build-sway-lib-std	1m 4s
check-sdk-harness-test-suite-compatibility	35s
forc-fmt-check-panic	1m 52s
forc-fmt-check-sway-examples	51s
forc-fmt-check-sway-lib-core	50s
forc-fmt-check-sway-lib-std	49s
build-forc-doc-sway-lib-std	1m 38s
build-forc-test-project	8m 54s
build-mdbook	5m 8s
cargo-build-workspace	50s
cargo-clippy	38s
cargo-toml-fmt-check	32s
cargo-fmt-check	13s
cargo-run-e2e-test-evm	3m 48s
cargo-test-lib-std	3m 21s
forc-run-benchmarks	2m 34s
cargo-test-forc	1m 51s
cargo-test-sway-lsp	7m 48s
cargo-test-workspace	3m 59s
cargo-unused-deps-check	2m 40s
forc-pkg-fuels-deps-check	18s
forc-unit-tests	3m 54s
pre-publish-check	0s
cargo-run-e2e-test-release	11m 4s
cargo-run-e2e-test	10m 44s
cargo-test-forc-client	3m 42s
cargo-test-forc-debug	2m 21s
build-publish-master-image	0s
publish	0s
notify-slack-on-failure	0s
build-publish-release-image	0s
Build and upload forc binaries to release	0s
verifications-complete	0s
	1h 25m 50s

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