Discord user and bot permission check options

[BIRD-UP73]

I added the following options to ICommand

userPerms?: PermissionResolvable,
botPerms?: PermissionResolvable

Now u can add Discord permissions a user needs to run a command. For example, in the avatar command

export const command: ICommand = {
    name: 'avatar',
    description: 'Shows the avatar of a user',
    aliases: ['av', 'avi', 'pfp', 'pic', 'icon', 'usericon', 'img', 'ava'],
    userPerms: ['SEND_MESSAGES'],
    botPerms: ['SEND_MESSAGES'],

In app.ts this check is done for both the bot and the user that tries to invoke the command.
U won't need 'SEND_MESSAGES' because u already check for that, but this can be done with any permissions.

[kira0x1]

This is a great idea!