feat: added following system using cookies

src/routes/follow.nim

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+import strutils, sequtils, uri
+import jester
+import router_utils
+import ".."/[types]
+
+proc createFollowRouter*(cfg: Config) =
+  router follow:
+    post "/follow":
+      let user = @"user"
+      var prefs = cookiePrefs()
+      if user.len > 0 and user notin prefs.following:
+        prefs.following.add(user)
+        setCookie("nitter_following", prefs.following.join(","), daysForward(360), path="/", httpOnly=true, secure=cfg.useHttps, sameSite=None)
+      redirect(refPath())
+
+    post "/unfollow":
+      let user = @"user"
+      var prefs = cookiePrefs()
+      if user.len > 0 and user in prefs.following:
+        prefs.following.keepItIf(it != user)
+        setCookie("nitter_following", prefs.following.join(","), daysForward(360), path="/", httpOnly=true, secure=cfg.useHttps, sameSite=None)
+      redirect(refPath())