Error when using `gf` on empty lines or non-file text

## Description When using the `gf` command with blade-nav.nvim on a line that doesn't contain a valid file path or component reference, an error message occurs: ``` E5108: Error executing lua: Vim(normal):E446: No file name under cursor stack traceback: [C]: in function 'execute' .../blade-nav.nvim/lua/blade-nav/gf.lua:29: in function 'gf' .../blade-nav.nvim/lua/blade-nav/gf.lua:745: in function <.../blade-nav.nvim/lua/blade-nav/gf.lua:744> ``` ## Steps to Reproduce 1. Open a Blade template file 2. Position cursor on an empty line or text that isn't a blade component file path 3. Press `gf` 4. Error message is displayed ## Suggested Fix If this behavior isn't intentional and you'd like to change it, here's the PR - #42