feat(extras): lang typst

Adds [`typst`](https://typst.app) support with preview.

lua/lazyvim/plugins/extras/lang/typst.lua

@@ -0,0 +1,35 @@
+return {
+  recommended = function()
+    return LazyVim.extras.wants({
+      ft = { "typst" },
+    })
+  end,
+  {
+    "nvim-treesitter/nvim-treesitter",
+    opts = { ensure_installed = { "typst" } },
+  },
+  {
+    "neovim/nvim-lspconfig",
+    opts = {
+      servers = {
+        typst_lsp = {},
+      },
+    },
+  },
+  -- Typst preview
+  {
+    "chomosuke/typst-preview.nvim",
+    ft = "typst",
+    build = function()
+      require("typst-preview").update()
+    end,
+    keys = {
+      {
+        "<leader>cp",
+        ft = "typst",
+        "<cmd>TypstPreviewToggle<cr>",
+        desc = "Typst Preview",
+      },
+    },
+  },
+}