[10242] Rewrite internal work chat command system.

[newsbot]

m src/game/Chat.cpp

m src/game/Chat.h

m src/game/ChatHandler.cpp

m src/game/Level0.cpp

m src/shared/revision_nr.h



[10242] Rewrite internal work chat command system.



* Use single command search function with recursion and reuse it in now more 

simple

  and consistent for execute/help/loading

* Add intergiry checks for hardcoded part of commands list. Fix some cases base 

at it.

* Fixed diff small problems in past code:

  - in console single symbol commands rejected (without dot start)

  - .help not output propertly subcommands list for not found subcommand

  - some other...

Дальше...