feat: ocaml warns to eval opam env

nvim/lua/plugins/lsp/ls/ocaml.lua

@@ -11,6 +11,14 @@ lsp.config("ocamllsp", {
     on_attach = on_attach,
 })
 
+vim.api.nvim_create_autocmd('BufReadPost', {
+    once = true,
+    pattern = "*.ml",
+    callback = function()
+        vim.notify("Make sure to `eval $(opam env)`", vim.log.levels.WARN)
+    end
+})
+
 -- ── Enable configs ───────────────────────────────────────────────
 local enable = vim.lsp.enable
 enable("ocamllsp")