type definition preview and readme updates

README.md

@@ -473,6 +473,7 @@ In `playground` folder, there is a `init.lua` and source code for you to play wi
 | n    | g0              | document symbol                                            |
 | n    | \<C-]\>         | go to definition (if multiple show listview)               |
 | n    | gp              | definition preview (show Preview)                          |
+| n    | gP              | type definition preview (show Preview)                     |
 | n    | \<C-LeftMouse\> | definition                                                 |
 | n    | g\<LeftMouse\>  | implementation                                             |
 | n    | \<Leader>gt     | treesitter document symbol                                 |

lua/navigator/definition.lua

@@ -190,6 +190,7 @@ local def = function()
     -- if client.resolved_capabilities.goto_definition then
     if client.server_capabilities.definitionProvider then
       client.request('textDocument/definition', ref_params, definition_hdlr, _bufnr)
+      return
     end
   end)
 end