Refactor config: fix conflicts, add features, update docs

- Fix keymap conflicts: session (<leader>sS/sR), substitute (<leader>sl)
- Remove duplicate keymaps (window, resize) and options (synmaxcol, foldmethod)
- Add which-key group names for better keymap organization
- Add auto-format on save with smart filtering (conform.nvim)
- Add diagnostic float on hover (CursorHold)
- Add safe buffer close with unsaved changes confirmation
- Add quickfix/location list navigation keymaps
- Add startup config validation (nvim version, executables)
- Enable plugin update notifications in lazy.nvim
- Clean up: remove temporary files (kkk, cleanup script)
- Clean up: remove commented code and fix double function loading
- Update README.md with comprehensive documentation
- Add CHANGELOG.md tracking all changes

lua/cargdev/plugins/which-key.lua

@@ -5,9 +5,38 @@ return {
     vim.o.timeout = true
     vim.o.timeoutlen = 200 -- Reduced from 500 for faster response
   end,
-  opts = {
-    -- your configuration comes here
-    -- or leave it empty to use the default settings
-    -- refer to the configuration section below
-  },
+  config = function()
+    local wk = require("which-key")
+
+    wk.setup({
+      plugins = {
+        marks = true,
+        registers = true,
+        spelling = { enabled = true, suggestions = 20 },
+      },
+      win = {
+        border = "rounded",
+        padding = { 2, 2, 2, 2 },
+      },
+    })
+
+    -- Register group names for better organization
+    wk.add({
+      { "<leader>b", group = "Buffer" },
+      { "<leader>c", group = "Code/Copilot" },
+      { "<leader>d", group = "Debug/DAP" },
+      { "<leader>e", group = "Explorer" },
+      { "<leader>f", group = "Find/Files" },
+      { "<leader>g", group = "Git" },
+      { "<leader>l", group = "LSP/LeetCode" },
+      { "<leader>m", group = "Format" },
+      { "<leader>n", group = "Notifications" },
+      { "<leader>p", group = "Project" },
+      { "<leader>q", group = "Quickfix" },
+      { "<leader>s", group = "Session/Split/Substitute" },
+      { "<leader>t", group = "Tab/Terminal/Text" },
+      { "<leader>x", group = "Trouble/Diagnostics" },
+      { "<leader>z", group = "Copilot Chat" },
+    })
+  end,
 }