docs: document external stdlib and add version notes for arrays and suffix#1249

jderochervlk merged 1 commit intovlk/docs-editingrescript-lang/rescript-lang.org:vlk/docs-editingfrom

codex/address-feedback-on-pr-#1237rescript-lang/rescript-lang.org:codex/address-feedback-on-pr-#1237Copy head branch name to clipboard