feat/fix: add rename cmd, fix rename error

- add <C-r> binding to omit the filename on rename (option is
  full_rename).
- call `silent! write!` on rename to avoid the `overwrite existing file`
  error when saving the buffer.

lua/lib/config.lua

@@ -67,6 +67,7 @@ function M.get_bindings()
     create          = keybindings.create or 'a',
     remove          = keybindings.remove or 'd',
     rename          = keybindings.rename or 'r',
+    full_rename     = keybindings.full_rename or '<C-r>',
     cut             = keybindings.cut or 'x',
     copy            = keybindings.copy or 'c',
     paste           = keybindings.paste or 'p',