Following Discord updates a lot of refactoring is needed

[Neztore]

With the recent updates to intents etc. and just some recent debugging I've realised that the local caches actually miss users a lot more often than I thought.
Possible solutions:

• GetAllUsers
• Fetch member manually (not possible as far as I can see, Unless I create a second client and set it to rest mode but even then I think that requries OAuth2 to work)
• Make Polaris ID based

The latter is my current target. Polaris will be made more ID based - i.e. for commands like WHOIS it will validate the user snowflake consists of numbers but not that it exists in caches before checking for a link. This is far more resilient and a few other things may also need updated.

[Neztore]

Turns out rest mode is apparently "safe" for use with Gateway, meaning users can be individually fetched if they do not exist - fixing a signficant issue.
This means the bot token must now be prefixed, which I've already committed locally and will need to put out.
This means we can:

• Get specific user
• Get specific member
• Get all members for a guild
  and more, which should solve a lot of the bugs that have been appearing lately.