feat: restructure keymaps and fix Lua configuration

- Restructure keymaps into modular folder system
  - Create keymaps/ folder with organized files
  - Separate keymaps by category (general, personal, lsp, telescope, plugins)
  - Auto-loading system for better maintainability

- Fix Lua configuration issues
  - Add compatibility layer for deprecated APIs
  - Fix snacks.nvim configuration
  - Disable latex support in render-markdown
  - Improve LSP configuration

- Enhance function navigation
  - Restore and improve LSP keymaps
  - Add comprehensive Telescope integration
  - Fix conflicting keymaps

- Improve overall Neovim setup
  - Better options configuration
  - Enhanced plugin configurations
  - Cleaner code organization

lua/cargdev/core/keymaps/general.lua

@@ -0,0 +1,19 @@
+-- General keymaps
+local keymap = vim.keymap
+local opts = { noremap = true, silent = true }
+
+-- =============================================================================
+-- GENERAL KEYMAPS
+-- =============================================================================
+
+-- Set leader key
+vim.g.mapleader = " "
+vim.g.maplocalleader = " "
+
+-- General keymaps
+keymap.set("i", "jk", "<ESC>", opts) -- Exit insert mode with jk
+keymap.set("n", "<leader>nh", ":nohl<CR>", opts) -- Clear search highlights
+keymap.set("n", "x", '"_x', opts) -- Delete character without copying into register
+
+-- Save and quit (additional)
+keymap.set("n", "<leader>Q", ":qa!<CR>", { desc = "Quit all" })