[Bots] Cleanup and remove preprocessors. (#2757)

* [Bots] Cleanup and remove preprocessors.

- Removes every `#ifdef BOTS` we have and locks bots behind `Bots:AllowBots` rule.
- Bot updates are now done by default similar to regular database updates.
- Modify `CMakeLists.txt`, `.drone.yml`, and `BUILD.md` to match the removal of `EQEMU_ENABLE_BOTS`.

* Cleanup

- Add SQL for enabling bots for servers with bots.
- Add message that tells players/operators bots are disabled.

* Suggested changes.

* Bot injection stuff

* Change SQL to bot SQL.

* Tweaks

* Remove `is_bot`

* Update version.h

* Update main.cpp

* Update database.cpp

* Fix name availability crash

* Remove bots from update script

Co-authored-by: Akkadius <akkadius1@gmail.com>

zone/zoning.cpp

@@ -28,9 +28,7 @@
 #include "worldserver.h"
 #include "zone.h"
 
-#ifdef BOTS
 #include "bot.h"
-#endif
 
 extern QueryServ* QServ;
 extern WorldServer worldserver;
@@ -43,10 +41,9 @@ extern Zone* zone;
 
 
 void Client::Handle_OP_ZoneChange(const EQApplicationPacket *app) {
-#ifdef BOTS
-	// This block is necessary to clean up any bot objects owned by a Client
-	Bot::ProcessClientZoneChange(this);
-#endif
+	if (RuleB(Bots, Enabled)) {
+		Bot::ProcessClientZoneChange(this);
+	}
 
 	bZoning = true;
 	if (app->size != sizeof(ZoneChange_Struct)) {