Feat: openrouter fetch/update free model list

todos.md

@@ -36,6 +36,9 @@
 - player stats: played games, lost, won, rating elo, opened opposite words, opened white words, opened black words. +
 - at the end of the game, all colors should be revealed;
 - tracing;
+====
+- action history to bot (not json); basic stuff: what words were previously given as clue and guessed (maybe what team bot is on);
+- automate getting list of free and non-thinking openrouter models;
 
 #### sse points
 - clue sse update;