Add root build.gradle.kts to have 'build' task at task=0 #54

	name: Continuous Integration
	on:
	push:
	branches:
	- '**'
	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- name: Set up JDK 21
	uses: actions/setup-java@v4
	with:
	java-version: 21
	distribution: adopt
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Set Gradlew executable
	run: chmod +x ./gradlew
	- name: Setup Gradle
	uses: gradle/actions/setup-gradle@v4
	- name: Generate code
	run: ./gradlew generate
	- name: Check phase 1
	run: ./gradlew build -PhomeworkTask=1
	- name: Check phase 2
	run: ./gradlew build -PhomeworkTask=2
	- name: Check phase 3
	run: ./gradlew build -PhomeworkTask=3
	- name: Check phase 4
	run: ./gradlew build -PhomeworkTask=4

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