feat(Algebra.GroupWithZero): generalize SMulZeroClass to MonoidWithZero and lift MulDistribMulAction to nonZeroDivisors #314278

	name: continuous integration (mathlib forks)

	on:
	pull_request_target:
	branches-ignore:
	# ignore tmp branches used by bors
	- 'staging.tmp*'
	- 'trying.tmp*'
	- 'staging*.tmp'
	- 'nolints'
	paths-ignore:
	# pull_request_target runs the workflow and its actions from the target branch, not
	# the PR, so PR changes under these dirs can't affect the run — triggering is wasteful.
	- '.github/**'

	concurrency:
	# label each workflow run; only the latest with each label will run
	# workflows on master get more expressive labels
	group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
	# cancel any running workflow with the same label
	cancel-in-progress: true

	# Limit permissions for GITHUB_TOKEN for the entire workflow
	permissions:
	contents: read
	id-token: write
	actions: read # Allow get-tools to download the prebuilt tools artifact from master's publish_tools runs
	pull-requests: write # Only allow PR comments/labels
	# All other permissions are implicitly 'none'

	jobs:
	build:
	name: ci (fork)
	if: ${{ github.event.pull_request.head.repo.fork && github.repository != 'leanprover-community/mathlib4-nightly-testing' }}
	uses: ./.github/workflows/build_template.yml
	with:
	concurrency_group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
	pr_branch_ref: ${{ github.event.pull_request.head.sha }}
	cache_application_id: ${{ vars.CACHE_NON_MASTER_WRITER_AZURE_APP_ID }}
	cache_environment: cache-upload-forks
	runs_on: pr
	secrets: inherit

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