Add GitHub workflow benchmark. #6

	name: Monitor benchmarks
	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	permissions:
	contents: write
	deployments: write

	jobs:
	benchmark:
	name: Run report bench
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- run: rustup update
	- name: Run benchmark
	run: cargo bench --bench decimal_bench --bench report_bench -- --output-format bencher \| tee output.txt
	- name: Store benchmark result
	uses: benchmark-action/github-action-benchmark@v1
	with:
	name: Criterion.rs Benchmark
	tool: 'cargo'
	output-file-path: output.txt
	auto-push: false
	alert-threshold: '200%'
	comment-on-alert: true
	fail-on-alert: true
	alert-comment-cc-users: '@xkikeg'
	summary-always: true
	github-token: ${{ secrets.GITHUB_TOKEN }}
	- name: Push benchmark result
	run: git push 'https://you:${{ secrets.GITHUB_TOKEN }}@github.com/you/repo-name.git' gh-pages:gh-pages
	if: github.event_name != 'pull_request'

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