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.

doc/nvim-tree-lua.txt

@@ -211,6 +211,7 @@ INFORMATIONS				        *nvim-tree-info*
 
 - type 'a' to add a file
 - type 'r' to rename a file
+- type `<C-r>` to rename a file and omit the filename on input
 - type 'x' to add/remove file/directory to cut clipboard
 - type 'c' to add/remove file/directory to copy clipboard
 - type 'p' to paste from clipboard. Cut clipboard has precedence over copy