feat: added following system using cookies

src/prefs.nim

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: AGPL-3.0-only
-import tables
+import tables, strutils, sequtils
 import types, prefs_impl
 from config import get
 from parsecfg import nil
@@ -13,6 +13,8 @@ proc updateDefaultPrefs*(cfg: parsecfg.Config) =
 
 proc getPrefs*(cookies: Table[string, string]): Prefs =
   result = defaultPrefs
+  if "nitter_following" in cookies:
+    result.following = cookies["nitter_following"].split(',').filterIt(it.len > 0)
   genCookiePrefs(cookies)
 
 template getPref*(cookies: Table[string, string], pref): untyped =