Add polygon announcer and sound player and door swapper to utils #25

	name: Java CI with Gradle

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: Set up JDK 16
	uses: actions/setup-java@v1
	with:
	java-version: 16
	- name: Cache Gradle packages
	uses: actions/cache@v2
	with:
	path: ~/.gradle/caches
	key: ${{ runner.os }}-gradle-${{ hashFiles('*/.gradle') }}
	restore-keys: ${{ runner.os }}-gradle
	- name: Grant execute permission for gradlew
	run: chmod +x gradlew
	- name: Build with Gradle
	run: ./gradlew build --stacktrace
	- name: Upload artifacts to Github Actions
	uses: actions/upload-artifact@v2
	with:
	name: Artifacts
	path: build/libs

Provide feedback