feat: add qotw reminder

[stifskere]

closes #7;

Added the commands

• qotw-date: lets you change the time of the reminder with the following format 1-7:1-24:0-59 as of day-of-week:hour:minute

Added the listeners

• qotwReminder: it adds a ready event that runs a function in the qotwManager

Added the schemas

• keyvaluepair: it's a global key value pair table to store values with keys

Added the types

• IntRange<F, T>: it lets you define a type for a range of numbers from F to T including F and T
• QotwReminderManager: used statically contains all the methods for the reminder command and bot managing
• QotwDate: interface for the date QOTW date format.

Notes

exported the client in an exports file for the sake of access in other files.

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Requires revision

[AsyncBanana]

It would be better if this were more modular and could support multiple scheduled events using an API similar to the command and event listener loader, with files exporting objects containing a cron formatted time property and a handler function. It shouldn't be too hard to combine the listener code and the current scheduling code to do this. Additionally, you can use something like cron-scheduler to help with parsing and scheduling the scheduled events.

There are two other, smaller things: first of all, while djs-fsrouter uses oop, we are trying to avoid it here. Luckily, I don't think it will be necessary with the new API. The other thing is that it might be better to just recreate this branch and create a new pull request so you can clean up the git tree.

Once these things are finished, I will review more of the minutiae.