fix: nil problem when jump to location when tab drop is set as jump_type (#2760)

* feat(lsp_definitions): adding `tab drop` as `jump_type`

* feat(lsp-jump-types): `tab drop` for LSP features

Now, you're able to use `tab drop` as `jump_type` for these LSP
features: references, type definitions, definitions an implementations.

* fix(docs): reordering `tab drop` option

* feat: generate docs

* fix: nil problem with `vim.uri_to_fname`

* fix: removing warning about `file_uri` variable not being used

---------

Co-authored-by: Simon Hauser <simon.hauser@helsinki-systems.de>

Author: HicaroD

lua/telescope/builtin/__lsp.lua

@@ -200,7 +200,11 @@ local function list_or_jump(action, title, opts)
         elseif opts.jump_type == "vsplit" then
           vim.cmd "vnew"
         elseif opts.jump_type == "tab drop" then
-          local file_path = vim.uri_to_fname(flattened_results[1].uri)
+          local file_uri = flattened_results[1].uri
+          if file_uri == nil then
+            file_uri = flattened_results[1].targetUri
+          end
+          local file_path = vim.uri_to_fname(file_uri)
           vim.cmd("tab drop " .. file_path)
         end
       end