Restructure config | Move some to a packer plugin | Lot of cleanup

* move teleacope files, updater and related utils to
  https://github.com/NvChad/core

* restructure config file and directory structure

* expose mappings for better escape

* allow multiple mappings for some

* improve merge table function for the same

* move autocommands to a seperate file

* rearrange everything alphabetically where sanely possible

* rearrange packer plugin list on the basis of trigerred state

config structure now

 .
├──  init.lua
├──  LICENSE
├──  lua
│  ├──  chadrc.lua
│  ├──  colors
│  │  ├──  highlights.lua
│  │  ├──  init.lua
│  │  └──  themes
│  │     ├──  chadracula.lua
│  │     ├──  everforest.lua
│  │     ├──  gruvchad.lua
│  │     ├──  javacafe.lua
│  │     ├──  mountain.lua
│  │     ├──  norchad.lua
│  │     ├──  one-light.lua
│  │     ├──  onedark.lua
│  │     ├──  tokyonight.lua
│  │     └──  tomorrow-night.lua
│  ├──  core
│  │  ├──  autocmds.lua
│  │  ├──  init.lua
│  │  ├──  mappings.lua
│  │  ├──  options.lua
│  │  └──  utils.lua
│  ├──  default_config.lua
│  └──  plugins
│     ├──  configs
│     │  ├──  autopairs.lua
│     │  ├──  autosave.lua
│     │  ├──  bufferline.lua
│     │  ├──  chadsheet.lua
│     │  ├──  compe.lua
│     │  ├──  dashboard.lua
│     │  ├──  gitsigns.lua
│     │  ├──  icons.lua
│     │  ├──  lspconfig.lua
│     │  ├──  luasnip.lua
│     │  ├──  nvimtree.lua
│     │  ├──  others.lua
│     │  ├──  statusline.lua
│     │  ├──  telescope.lua
│     │  ├──  treesitter.lua
│     │  └──  zenmode.lua
│     ├──  init.lua
│     └──  packerInit.lua
└──  README.md

lua/plugins/configs/telescope.lua

@@ -0,0 +1,87 @@
+local present, telescope = pcall(require, "telescope")
+if not present then
+   return
+end
+
+telescope.setup {
+   defaults = {
+      vimgrep_arguments = {
+         "rg",
+         "--color=never",
+         "--no-heading",
+         "--with-filename",
+         "--line-number",
+         "--column",
+         "--smart-case",
+      },
+      prompt_prefix = "   ",
+      selection_caret = "  ",
+      entry_prefix = "  ",
+      initial_mode = "insert",
+      selection_strategy = "reset",
+      sorting_strategy = "descending",
+      layout_strategy = "horizontal",
+      layout_config = {
+         horizontal = {
+            prompt_position = "top",
+            preview_width = 0.55,
+            results_width = 0.8,
+         },
+         vertical = {
+            mirror = false,
+         },
+         width = 0.87,
+         height = 0.80,
+         preview_cutoff = 120,
+      },
+      file_sorter = require("telescope.sorters").get_fuzzy_file,
+      file_ignore_patterns = {},
+      generic_sorter = require("telescope.sorters").get_generic_fuzzy_sorter,
+      path_display = { "absolute" },
+      winblend = 0,
+      border = {},
+      borderchars = { "─", "│", "─", "│", "╭", "╮", "╯", "╰" },
+      color_devicons = true,
+      use_less = true,
+      set_env = { ["COLORTERM"] = "truecolor" }, -- default = nil,
+      file_previewer = require("telescope.previewers").vim_buffer_cat.new,
+      grep_previewer = require("telescope.previewers").vim_buffer_vimgrep.new,
+      qflist_previewer = require("telescope.previewers").vim_buffer_qflist.new,
+      -- Developer configurations: Not meant for general override
+      buffer_previewer_maker = require("telescope.previewers").buffer_previewer_maker,
+   },
+   extensions = {
+      fzf = {
+         fuzzy = true, -- false will only do exact matching
+         override_generic_sorter = false, -- override the generic sorter
+         override_file_sorter = true, -- override the file sorter
+         case_mode = "smart_case", -- or "ignore_case" or "respect_case"
+         -- the default case_mode is "smart_case"
+      },
+      media_files = {
+         filetypes = { "png", "webp", "jpg", "jpeg" },
+         find_cmd = "rg", -- find command (defaults to `fd`)
+      },
+   },
+}
+
+if
+   not pcall(function()
+      -- NvChad pickers
+      -- load the theme_switcher extension
+      telescope.load_extension "themes"
+      -- load the term_picker extension
+      telescope.load_extension "terms"
+
+      telescope.load_extension "fzf"
+      telescope.load_extension "media_files"
+   end)
+then
+   -- This should only trigger when in need of PackerSync, so better do it
+   print "After completion of PackerCompile, restart neovim."
+   -- Trigger packer compile on PackerComplete, so it properly waits for PackerSync
+   vim.cmd 'autocmd User PackerComplete ++once lua print "Waiting for PackerCompile.." require("packer").compile()'
+   vim.cmd 'autocmd User PackerCompileDone ++once echo "Packer Compile done, restart neovim."'
+   require "plugins"
+   require("packer").update("core", "telescope-fzf-native.nvim", "telescope-media-files.nvim")
+end