add showcase and update engine version to 4.89.2 #1722

	name: Check Showcases
	on:
	schedule:
	- cron: "0 0,12 * * *" # run twice daily
	push:
	branches:
	- master
	paths:
	- "showcases/**"
	pull_request:
	branches:
	- "**"
	paths:
	- "showcases/**"
	workflow_dispatch: {}

	jobs:
	check-index-showcases:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Repo
	uses: actions/checkout@v3.5.2
	- name: Setup Node
	uses: actions/setup-node@v3.6.0
	with:
	node-version: 16
	- name: Prepare static artifacts
	run: \|
	npm install
	npm run check:showcases-index

	test-showcases:
	# except for pull request, make sure to run the pipeline only for default branch
	if: github.event_name == 'pull_request' \|\| (github.ref == 'refs/heads/master' && github.repository == 'finos/legend')
	name: Run Compilation Check for Showcases
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Code
	uses: actions/checkout@v3
	- name: Setup Java
	uses: actions/setup-java@v3
	with:
	java-version: "11"
	distribution: "temurin"
	cache: "maven"
	# For PRs only want to run changed files
	- name: Get Changed Files for PR
	if: ${{ github.event_name == 'pull_request' }}
	working-directory: ./showcases
	run: echo "CHANGED_FILES=`git diff --name-only --diff-filter=AMR $GITHUB_BASE_REF...$GITHUB_HEAD_REF \| paste -sd ','`" >> "$GITHUB_ENV"
	- name: Run test
	working-directory: ./showcases
	run: \|
	if [ $SHOWCASE_LOCATIONS == "" ]; then
	locations=data
	else
	locations=$SHOWCASE_LOCATIONS
	fi
	mvn versions:use-latest-versions
	mvn -B -Dmaven.surefire.thread.count=$THREAD_COUNT -Dshowcase.locations=$locations test
	env:
	THREAD_COUNT: 3
	SHOWCASE_LOCATIONS: ${{ env.CHANGED_FILES }}

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