docs(readme): improve to make more compelling and attractive

[cvigilv]

As of today, the README of the plugin is pretty bland, just providing the possible user to the information without being compelling or exemplifying why this plugins could be useful. Additionally, other plugins do similar things (so I should showcase this in case someone would prefer those alternatives) and I have a clear roadmap of what I would like to do with this project.

So the tasks for this issue are the following:

• [x] Improve describing the intention and philosophy of the plugin
  • Emphasis in Vim philosophy, making use of this "common" language a Neovim user should know
  • Showcase the customizability of the plugin
  • Make clear that this is a plugin to (i) use WYSIWYG or (ii) use with a lot of customization
• [x] Update and improve ROADMAP
  • Maybe extract to other file (?)
• [x] Add section with similar plugins
  • spooky.nvim
  • template.nvim
  • new-file-template.nvim
  • skel-nvim

[cvigilv]

Closed by cf86e9d4d37149b46ab49090acb41d6718ea2132