feat: setup treesitter.

lua/plugins/treesitter.lua

@@ -0,0 +1,26 @@
+return {
+  {
+    "nvim-treesitter/nvim-treesitter",
+    config = function()
+      require("nvim-treesitter.configs").setup({
+        ensure_installed = { "c", "lua", "vim", "vimdoc", "query", "go", "nix" },
+
+        auto_install = true,
+
+        highlight = {
+          enable = true,
+        },
+
+        incremental_selection = {
+          enable = true,
+          keymaps = {
+            init_selection = "<Leader>ss",
+            node_incremental = "<Leader>si",
+            scope_incremental = "<Leader>sc",
+            node_decremental = "<Leader>sd",
+          },
+        },
+      })
+    end,
+  },
+}