chore: rename libs→common_libs, all bot dirs to _garage suffix, fix all path refs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

SAC_LSTM_Bot_garage/src/SAC_LSTM_Bot.json

@@ -0,0 +1,11 @@
+{
+  "name": "SAC_LSTM_Bot",
+  "version": "0.1.0",
+  "authors": ["Davide Cappellini"],
+  "description": "SAC+LSTM Tank Royale bot — self-reported identity; MUST match the name in ../SAC_LSTM_Bot.json (booter identity) or the training runner never sees this bot join",
+  "homepage": "",
+  "countryCodes": ["IT"],
+  "gameTypes": ["classic", "melee", "1v1"],
+  "platform": "Nim",
+  "programmingLang": "Nim"
+}