Feature description

This is a suggestion regarding #885.
It contains major changes across the board.
Other suggestions welcome..

I'm looking for a way that doesn't change the original configuration too much.
Work is done at misumisumi/nvimdots/add-user-custom-function.

• Implementing the load_plugin function
  • Extend default value when given value is a table
  • Replace completely when the given value is a function
• Support override for event.lua
• Support override for options.lua
• Support override for settings.lua
• Support override for keymap.lua

Additional information

No response