feat(moonbit): add MoonBit language extra

lua/lazyvim/plugins/extras/lang/moonbit.lua

@@ -0,0 +1,49 @@
+return {
+  recommended = function()
+    return LazyVim.extras.wants({
+      ft = { "moonbit", "mbt" },
+      root = { "moon.mod.json" },
+    })
+  end,
+
+  {
+    "nvim-treesitter/nvim-treesitter",
+    opts = { ensure_installed = { "moonbit" } },
+  },
+
+  -- TODO: Enable once moonbit LSP is available in mason registry
+  -- https://github.com/mason-org/mason-registry
+  -- {
+  --   "mason-org/mason.nvim",
+  --   optional = true,
+  --   opts = function(_, opts)
+  --     opts.ensure_installed = opts.ensure_installed or {}
+  --     vim.list_extend(opts.ensure_installed, { "moonbit-lsp" })
+  --   end,
+  -- },
+
+  {
+    "neovim/nvim-lspconfig",
+    opts = {
+      servers = {
+        moonbit = {
+          cmd = { "moonbit-lsp" },
+          filetypes = { "moonbit", "mbt" },
+          root_dir = function(fname)
+            return require("lspconfig.util").root_pattern("moon.mod.json")(fname)
+          end,
+        },
+      },
+    },
+  },
+
+  {
+    "stevearc/conform.nvim",
+    optional = true,
+    opts = {
+      formatters_by_ft = {
+        moonbit = { "moonfmt" },
+      },
+    },
+  },
+}