Documentation for `fzf_lua` support (#149)

README.md

@@ -44,8 +44,8 @@ require("zk").setup()
 **The default configuration**
 ```lua
 require("zk").setup({
-  -- can be "telescope", "fzf" or "select" (`vim.ui.select`)
-  -- it's recommended to use "telescope" or "fzf"
+  -- can be "telescope", "fzf", "fzf_lua" or "select" (`vim.ui.select`)
+  -- it's recommended to use "telescope", "fzf" or "fzf_lua"
   picker = "select",
 
   lsp = {

doc/zk.txt

@@ -58,8 +58,8 @@ SETUP                                                                   *zk-setu
 The default configuration
 >
     require("zk").setup({
-      -- can be "telescope", "fzf" or "select" (`vim.ui.select`)
-      -- it's recommended to use "telescope" or "fzf"
+      -- can be "telescope", "fzf", "fzf_lua" or "select" (`vim.ui.select`)
+      -- it's recommended to use "telescope", "fzf" or "fzf_lua"
       picker = "select",
       lsp = {
         -- `config` is passed to `vim.lsp.start_client(config)`