[Feat] allow no region selection in CodeSnapHighlight (#152)

* Allow user to continue without selecting a highlight region

* Update README

Author: sarahsturgeon

README.md

@@ -205,7 +205,7 @@ CodeSnapSaveHighlight # Take code snapshot with highlights code blocks and save
 ```
 
 #### How to use
-For take a code snapshot with highlights code blocks and save it somewhere. First you need to select code which you want to snapshot, then enter the command `CodeSnapSaveHighlight` to open a window show you the selected code which from previous step, now you can select code which you want to highlight, finally press the Enter key, CodeSnap will generate a snapshot with highlight blocks and save it in save_path.
+For take a code snapshot with highlights code blocks and save it somewhere. First you need to select code which you want to snapshot, then enter the command `CodeSnapSaveHighlight` to open a window show you the selected code which from previous step, now you can select code which you want to highlight _(if any - you can use these without actually highlighting anything)_, finally press the Enter key, CodeSnap will generate a snapshot with highlight blocks and save it in save_path.
 
 Here is an example video:
 

lua/codesnap/highlight.lua

@@ -40,15 +40,15 @@ function highlight_module.create_highlight_selector_window(cb_name, code)
   vim.api.nvim_buf_set_option(bufnr, "filetype", vim.bo.filetype)
   vim.api.nvim_buf_set_keymap(bufnr, "n", "q", ":q<CR>", {})
   vim.api.nvim_buf_set_keymap(bufnr, "", "<ESC>", ":q<CR>", {})
-  vim.api.nvim_buf_set_keymap(
-    bufnr,
-    "v",
+  vim.keymap.set(
+    { "v", "n" },
     "<CR>",
     ":lua require('codesnap.highlight').call_cb_with_parsed_config('"
       .. cb_name
       .. "', require('codesnap.utils.visual').get_start_line_number(), require('codesnap.utils.visual').get_end_line_number())<CR>",
-    { silent = true }
+    { silent = true, buffer = bufnr }
   )
+
   vim.api.nvim_set_current_win(window_id)
 end