Make tag lookup fully concurrent

[chouzar]

For making a lookup in the tagged table we currently need to first retrieve the Table Id, then make the search in ETS:

https://github.com/chouzar/chip/blob/1cbf02bfec648c6d21e83dec3b755124f58834d8/src/chip.gleam#L138-L144

This puts a bit of a slowdown to calls from different callers as they have to wait for the registry to return the reference. Some possible solutions:

• A strategy for naming the registry, so that it can be accessed through an atom.
  • No easy way to do this if the registry itself is not named.
• Have a single global ETS registry that is indexed by {pid, tag}, some of the costs:
  • Bigger table
  • A public table that can be accessed by any process
  • Having to juggle the ownership of the table
  • Slower access through the name (but faster than current implementation
• Having a helper function to retrieve the Table Id, then make searches in that context.