feat(go): initialize a minimal Go module and CI workflow for the upcoming Go SDK #1

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	name: GraphAr Go CI

	on:
	push:
	branches:
	- main
	paths:
	- 'go/**'
	- '.github/workflows/go.yml'
	pull_request:
	branches:
	- main
	paths:
	- 'go/**'
	- '.github/workflows/go.yml'

	concurrency:
	group: ${{ github.repository }}-${{ github.event.number \|\| github.head_ref \|\| github.sha }}-${{ github.workflow }}
	cancel-in-progress: true

	jobs:
	go-test:
	name: Go 1.21
	runs-on: ubuntu-latest
	if: ${{ !contains(github.event.pull_request.title, 'WIP') && !github.event.pull_request.draft }}
	steps:
	- uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: '1.21'
	cache: true
	cache-dependency-path: go/go.sum

	- name: Go test
	working-directory: go
	run: go test ./...

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