ci: Add luacheck ci job (#317)

* Add luacheck ci job

* Fix most of the linting issues

* fixup: lint

Co-authored-by: TJ DeVries <devries.timothyj@gmail.com>

lua/telescope/utils.lua

@@ -79,10 +79,6 @@ utils.quickfix_items_to_entries = function(locations)
   return results
 end
 
-utils.new_ngram = function()
-  return require("telescope._private.NGram"):new()
-end
-
 -- TODO: Figure out how to do this... could include in plenary :)
 -- NOTE: Don't use this yet. It will segfault sometimes.
 --
@@ -142,7 +138,7 @@ function utils.buf_delete(bufnr)
   if bufnr == nil then return end
 
   -- Suppress the buffer deleted message for those with &report<2
-  start_report = vim.o.report
+  local start_report = vim.o.report
   if start_report < 2 then vim.o.report = 2 end
 
   if vim.api.nvim_buf_is_valid(bufnr) and vim.api.nvim_buf_is_loaded(bufnr) then