Support 64 bit int/fixed as number

[wemeetagain]

In order to be performant in certain usecases, we need to be able to force generated code to use number instead of bigint.

Protons should be extended to support a field option named jstype used like so:

message Foo {
  uint64 bar = 1 [jstype = JS_NUMBER];
}

import { Foo } from './foo.js'

const foo = {
  bar: 100 // a number :)
}

typeof Foo.decode(Foo.encode(foo)).bar === 'number'

See

• https://protobuf.dev/programming-guides/proto3/#customoptions
• https://protobuf.dev/programming-guides/proto2/#options
• https://github.com/protocolbuffers/protobuf/blob/f881c8fe15b8c9aa3be997103eee5f2bea02984d/src/google/protobuf/descriptor.proto#L620-L641
• feat!: switch back to protons ChainSafe/js-libp2p-gossipsub#327 (comment)