multi: Move each serializer into its own package #2

	name: Build and Test
	on: [push, pull_request]
	permissions:
	contents: read

	jobs:
	build:
	name: Go CI
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go: ["1.21", "1.22"]
	steps:
	- name: Check out source
	uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b #v4.1.4
	- name: Set up Go
	uses: actions/setup-go@cdcb36043654635271a94b9a6d1392de5bb323a7 #v5.0.1
	with:
	go-version: ${{ matrix.go }}
	- name: Verify benchmarks validate
	run: VALIDATE=1 go test -v -bench . -run bench -benchtime 1ms

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