chore(neovim): Use snacks.nvim to view images

- Remove `image.nvim` for image display on markdown
- Simple code reorg

common/.config/nvim/init.lua

@@ -26,7 +26,7 @@ if not (vim.uv or vim.loop).fs_stat(lazypath) then
     if vim.v.shell_error ~= 0 then
         vim.api.nvim_echo({
             { "Failed to clone lazy.nvim:\n", "ErrorMsg" },
-            { out, "WarningMsg" },
+            { out,                            "WarningMsg" },
             { "\nPress any key to exit..." },
         }, true, {})
         vim.fn.getchar()