feat: buf highlights for current buffer fuzzy find (#732)

* feat: Add buffer highlights from treesitter

* fix: Handle not having tree sitter in some buffers

* fixup

* fixup

* fixup: move back to old node

lua/telescope/pickers/entry_display.lua

@@ -59,8 +59,16 @@ entry_display.create = function(configuration)
             hl_start = hl_start + #results[j] + (#configuration.separator or 1)
           end
           local hl_end = hl_start + #str:gsub('%s*$', '')
-          table.insert(highlights, { { hl_start, hl_end }, hl })
+
+          if type(hl) == "function" then
+            for _, hl_res in ipairs(hl()) do
+              table.insert(highlights, { { hl_res[1][1] + hl_start, hl_res[1][2] + hl_start }, hl_res[2] })
+            end
+          else
+            table.insert(highlights, { { hl_start, hl_end }, hl })
+          end
         end
+
         table.insert(results, str)
       end
     end
@@ -75,6 +83,7 @@ entry_display.create = function(configuration)
         table.insert(highlights, { { hl_start, hl_end }, configuration.separator_hl })
       end
     end
+
     local final_str = table.concat(results, configuration.separator or "│")
     if configuration.hl_chars then
       for i = 1, #final_str do