Improve LSP configs and change keybindings to align with default nvim

0.11 ones

lua/plugins/undotree.lua

@@ -0,0 +1,18 @@
+return {
+    "mbbill/undotree",
+
+    config = function()
+        if vim.fn.has("persistent_undo") == 1 then
+            local target_path = vim.fn.expand("~/.undodir")
+
+            -- Create the directory if it doesn't exist
+            if vim.fn.isdirectory(target_path) == 0 then
+                vim.fn.mkdir(target_path, "p", "0700")
+            end
+
+            -- Set the undodir and enable undo file
+            vim.o.undodir = target_path
+            vim.o.undofile = true
+        end
+    end
+}