Consider adding resource type to resource selector

[holic]

Right now we generally use the pattern:

namespace (bytes16) + name (bytes16)

I am proposing we explore a pattern like:

resource type (bytes2) + namespace (bytes14) + name (bytes16)

This comes from seeing a few patterns emerge:

• ResourceType table/enum for registering systems:

  mud/packages/world/mud.config.ts

  Lines 95 to 102 in 5150544

  	ResourceType: {
  	directory: "modules/core/tables",
  	keySchema: {
  	resourceSelector: "bytes32",
  	},
  	schema: {
  	resourceType: "Resource",
  	},

• module namespace suffix:

  mud/packages/world/src/modules/uniqueentity/constants.sol

  Line 5 in 5150544

  bytes16 constant MODULE_NAME = bytes16("uniqueEntity.m");

• onchain table vs offchain tables: feat: replace ephemeral with offchain tables #1496 (comment)

[alvrs]

A semi-related thing to consider here is that we currently don't write to the ResourceType table if the table is registered directly via StoreCore instead of a call to world.registerTable (because ResourceType is a World concept, not a Store concept). Encoding the resource type in the selector might solve this if it means we don't need ResourceType anymore.