Add ID permission handlers

[suneettipirneni]

There are new helpers for ID-based checking:

const command: Command = {
  ...
  permissions: checkAll(
    RolePermissions.allIDs('855841786869841933', '855841786857127942'),
    ChannelPermissions.inIDs('855841788115288107'),
  )
  ...
};

[rob-3]

Looks good! Two suggestions (lmk what you think):

1. Flatten the namespace and rename functions. I think this will make this a bit less clunky for use with helpers like checkAll; for example:

checkAll(RolesPermissions.oneName(Roles.president), ChannelPermissions.inChannels(Channels.exec_board))

vs

checkAll(inRoles(Roles.president), inChannels(Channels.exec_board))

Some suggestions for renaming:

• RolePermissions.allNames => allRoleNames
• RolePermissions.oneName => inRoleNames (this keeps the wording the same as the ChannelPermissions)
• RolePermissions.allIDs => allRoles (this will encourage people to use the Snowflake way by default and get all the benefits we've discussed)
• RolePermissions.oneID => inRoles
• ChannelPermissions.inNames => inChannelNames
• ChannelPermissions.inIDs => inChannels
• CategoryPermissions.inNames => inCategoryNames
• CategoryPermissions.inIDs => inCategories

2. (maybe out of scope for this PR) We have a checkAll() helper but not a "checkOne()" or similar thing to express logic like: "either be in #general OR be a director" to use this command

[rob-3]

Ok new commit is good. Do you prefer oneRoleName over inRoleNames? It bothers me a little how the channel and role versions of the same functions have different prefixes.