feat: enhance Neovim configuration and add community plugins

lua/plugins/supermaven.lua

@@ -0,0 +1,29 @@
+return {
+  "supermaven-inc/supermaven-nvim",
+  event = "InsertEnter",
+  cmd = { "SupermavenUseFree", "SupermavenUsePro" },
+  opts = {
+    keymaps = {
+      accept_suggestion = nil, -- handled by completion engine
+    },
+  },
+  specs = {
+    {
+      "AstroNvim/astrocore",
+      opts = {
+        options = {
+          g = {
+            -- set the ai_accept function
+            ai_accept = function()
+              local suggestion = require "supermaven-nvim.completion_preview"
+              if suggestion.has_suggestion() then
+                vim.schedule(function() suggestion.on_accept_suggestion() end)
+                return true
+              end
+            end,
+          },
+        },
+      },
+    },
+  },
+}