feat(prospective-parachains): Implement `HandleIntroduceSecondedCandidate` #13890

	on:
	pull_request:
	# Commented paths to avoid skipping required workflow
	# See https://github.community/t/feature-request-conditional-required-checks/16761
	# paths:
	# - .github/workflows/checks.yml
	# - .github/PULL_REQUEST/pull_request.go
	# - .golangci.yml
	# - "*/.go"
	# - go.mod
	# - go.sum

	name: checks

	jobs:
	linting:
	runs-on: buildjet-4vcpu-ubuntu-2204
	steps:
	- name: Cancel Previous Runs
	uses: styfle/[email protected]
	with:
	all_but_latest: true

	- uses: actions/checkout@v4

	- uses: actions/setup-go@v5
	with:
	go-version: "1.21"
	stable: true
	check-latest: true

	- name: Snake case test cases
	run: \|
	go run ./cmd/testcases/main.go && \
	git diff --exit-code

	- name: Lint
	run: make lint

	- name: Up to date Go proto generated
	run: \|
	go install google.golang.org/protobuf/cmd/[email protected] && \
	PROTOC_VERSION=21.10 && \
	curl -sL --output protoc.zip "https://github.com/protocolbuffers/protobuf/releases/download/v${PROTOC_VERSION}/protoc-${PROTOC_VERSION}-linux-x86_64.zip" && \
	sudo unzip protoc.zip -d /usr/local && \
	rm protoc.zip && \
	go generate -run "protoc" ./... && \
	git diff --exit-code

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