Recommend stdlib functions over Belt for converting between float/int/string #6697

Job	Run time
build-rewatch (macos-13, x86_64-apple-darwin, darwin-x64)	17s
build-rewatch (macos-14, aarch64-apple-darwin, darwin-arm64)	14s
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	1m 35s
build-rewatch (ubuntu-24.04, x86_64-unknown-linux-musl, linux-x64)	8s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	1m 50s
build-rewatch (ubuntu-24.04-arm, aarch64-unknown-linux-musl, linux-arm64)	17s
build-compiler (macos-13, 5.3.0, true, darwin-x64)	1m 51s
build-rewatch (windows-latest, x86_64-pc-windows-gnu, win32-x64)	21s
build-compiler (macos-14, 5.3.0, true, darwin-arm64)	2m 4s
build-compiler (windows-latest, 5.3.0, true, win32-x64)	1m 48s
build-compiler (ubuntu-24.04, ocaml-variants.5.2.1+options,ocaml-option-static)	1m 59s
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static)	2m 4s
build-compiler (ubuntu-24.04, ocaml-variants.4.14.2+options,ocaml-option-static)	1m 55s
pkg-pr-new	1s
installationTest	1s
publish	1s
	16m 26s

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