add `NormalizationAstLoader` #1557

Job	Run time
Build website	43s
Build js packages	23s
cargo clippy	15s
cargo fmt	10s
Run cargo test (excluding relay tests)	37s
Run prettier	21s
Typecheck and Lint Demos (github-demo)	27s
Typecheck and Lint Demos (pet-demo)	25s
Typecheck and Lint Demos (vite-demo)	25s
Build fixtures / Run generate_isograph_fixtures	14s
Build compiler (x86_64-unknown-linux-musl) / Build compiler	1m 37s
Build json schema / Run build_json_schema	14s
Build compiler (aarch64-unknown-linux-musl, ubuntu-latest, isograph_cli, isograph_cli-bin-linux-a... / Build compiler	2m 49s
Build compiler (aarch64-apple-darwin, macos-latest, isograph_cli, isograph_cli-macos-arm64) / Build compiler	1m 25s
Build compiler (x86_64-apple-darwin, macos-latest, isograph_cli, isograph_cli-macos-x64) / Build compiler	2m 4s
Build compiler (x86_64-pc-windows-msvc, windows-latest, true, isograph_cli.exe, isograph_cli-bin-... / Build compiler	4m 29s
Build demos (github-demo)	3s
Build demos (pet-demo)	4s
Build demos (vite-demo)	5s
All checks passed	0s
Release packages to NPM	0s
Deploy website	0s
Release packages to NPM (latest)	0s
	16m 50s

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