added flutter

lua/plugins/flutter.lua

@@ -0,0 +1,11 @@
+return {
+  -- Add the community repository of plugin specifications
+  "AstroNvim/astrocommunity",
+  { import = "astrocommunity.pack.dart" },
+  -- Configure flutter-tools
+  { "akinsho/flutter-tools.nvim", 
+    opts = {
+      ...
+    }
+  }
+}