Clarify random bot timing configuration section and parameter descriptions (#1826)

This update reorganizes and rewrites the random bot timing configuration
section for clarity and accuracy. The previous section was mislabeled as
"INTERVALS" and lacked precise descriptions. The new version:

1. Renames the header to RANDOM BOT TIMING AND BEHAVIOR
2. Adds concise, standardized comments for each parameter
3. Corrects misleading terminology (not all values are intervals)
4. Documents defaults and actual behavior clearly for easier tuning and
maintenance
5. No functional code changes — documentation and readability only.

Note, this is derived information from reading the code.
Please double check if I have captured each param accurately!

src/RandomPlayerbotMgr.cpp

@@ -822,7 +822,7 @@ uint32 RandomPlayerbotMgr::AddRandomBots()
             uint32 add_time = sPlayerbotAIConfig->enablePeriodicOnlineOffline
                                 ? urand(sPlayerbotAIConfig->minRandomBotInWorldTime,
                                         sPlayerbotAIConfig->maxRandomBotInWorldTime)
-                                : sPlayerbotAIConfig->permanantlyInWorldTime;
+                                : sPlayerbotAIConfig->permanentlyInWorldTime;
 
             SetEventValue(charInfo.guid, "add", 1, add_time);
             SetEventValue(charInfo.guid, "logout", 0, 0);