feat: notify admin to update solvers in the community

[Anyitechs]

This PR schedules a daily job at midnight to notify the admin of a community that there are no solvers in the community. The maximum number of notification messages right now is set to 5, afterwards the community is disabled.

Fixes #314

[Catrya]

Hello, did you tested it locally? It's not working properly:

• This message is not being displayed: Your community ${community.name} doesn't have any solvers. Please add at least one solver to avoid being disabled.
• Even though the logs say: Community: ${community.name} has been disabled due to lack of solvers. the community is not being disabled. You can continue using it normally.
• I recommend putting the warning messages to the administrators in the language they have the bot set in, in the yaml of ./locales. You can see as an example at Add cronjob to notify admin about missing solvers (#314) #563

[Anyitechs]

Hello, did you tested it locally? It's not working properly:

• This message is not being displayed: Your community ${community.name} doesn't have any solvers. Please add at least one solver to avoid being disabled.
• Even though the logs say: Community: ${community.name} has been disabled due to lack of solvers. the community is not being disabled. You can continue using it normally.
• I recommend putting the warning messages to the administrators in the language they have the bot set in, in the yaml of ./locales. You can see as an example at Add cronjob to notify admin about missing solvers (#314) #563

Thank you for the review. I'll work on these feedbacks.

[Anyitechs]

Hi @Catrya, I've addressed all the feedbacks here. Please have a look and let me know if there're other changes.

Hello, did you tested it locally? It's not working properly:

• This message is not being displayed: Your community ${community.name} doesn't have any solvers. Please add at least one solver to avoid being disabled.
• Even though the logs say: Community: ${community.name} has been disabled due to lack of solvers. the community is not being disabled. You can continue using it normally.
• I recommend putting the warning messages to the administrators in the language they have the bot set in, in the yaml of ./locales. You can see as an example at Add cronjob to notify admin about missing solvers (#314) #563

[Catrya]

Hi @Anyitechs , much better, it already sends messages to the admins and disables the community. However, I think the message for the admins could be improved so that they know how much time they have to put a new admin.
I think it could be something like this:

Your community ${communityName} does not have any solvers. Please add at least one within X days to prevent the community from being disabled.

Actually the number of notifications that the solver receives before disabling the community is MAX_MESSAGES -1 because it disables it in MAX_MESSAGES, I suggest that it shows that number of notifications before disabling it

I will continue testing and I will tell you if I find any bug, good job!