feat: asyncify pickers - except for live_grep (#709)

* something kind of works already

* yayayayayayayayayayayayayayayayayayayayayayayayayayayayayayayayaya

* use async for everything besides live jobs

* fix: fixup autocmds previewer

* fix: lints for prime

* temp: Add example of how we can think about async sorters

* feat: Allow picker to decide when to cancel

* fix: simplify scoring logic and tests

* fixup: name

* fix: Move back towards more backwards compat methods

* fixup: Remove results from opts

* fixup: remove trailing quote

* fixup: Attempt to clean up some more async items. Next is status

* wip: Add todo for when bfredl implements extmarks over the EOL

* wip

* fixup: got em

* fixup: cleaning

* fixup: docs

lua/telescope/entry_manager.lua

@@ -26,7 +26,7 @@ if past loop of must have scores,
 local EntryManager = {}
 EntryManager.__index = EntryManager
 
-function EntryManager:new(max_results, set_entry, info, id)
+function EntryManager:new(max_results, set_entry, info)
   log.trace("Creating entry_manager...")
 
   info = info or {}
@@ -40,7 +40,6 @@ function EntryManager:new(max_results, set_entry, info, id)
   set_entry = set_entry or function() end
 
   return setmetatable({
-    id = id,
     linked_states = LinkedList:new { track_at = max_results },
     info = info,
     max_results = max_results,
@@ -128,13 +127,6 @@ function EntryManager:_append_container(picker, new_container, should_update)
 end
 
 function EntryManager:add_entry(picker, score, entry)
-  if picker and picker.id then
-    if picker.request_number ~= self.id then
-      error("ADDING ENTRY TOO LATE!")
-      return
-    end
-  end
-
   score = score or 0
 
   local max_res = self.max_results