[GH-1] Add GH workflows for PR testing and Maven deploy on push to main.

.github/workflows/deploy-to-maven.yml

@@ -0,0 +1,44 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+    push:
+        branches: [ main ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+    # This workflow contains a single job called "build"
+    build:
+        # The type of runner that the job will run on
+        runs-on: ubuntu-latest
+
+        # Steps represent a sequence of tasks that will be executed as part of the job
+        steps:
+            # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+            -   uses: actions/checkout@v4
+            -   uses: actions/setup-java@v4
+                with:
+                    java-version: '17'
+                    distribution: 'temurin'
+
+            # Runs a set of commands using the runners shell
+            -   name: Build
+                run: mvn -B package
+
+            -   name: Set up Apache Maven Repository
+                uses: actions/setup-java@v4
+                with: # running setup-java again overwrites the settings.xml
+                    distribution: 'temurin'
+                    java-version: '17'
+                    server-id: akaene # Value of the distributionManagement/repository/id field of the pom.xml
+                    server-username: MAVEN_USERNAME # env variable for username in deploy
+                    server-password: MAVEN_PASSWORD # env variable for password in deploy
+
+            -   name: Publish to Apache Maven Central
+                run: mvn deploy
+                env:
+                    MAVEN_USERNAME: maven
+                    MAVEN_PASSWORD: ${{ secrets.AKAENE_MAVEN_PASSWORD }}

.github/workflows/pull-request-to-main.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+    pull_request:
+        branches: [ main ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+    # This workflow contains a single job called "build"
+    build:
+        # The type of runner that the job will run on
+        runs-on: ubuntu-latest
+
+        # Steps represent a sequence of tasks that will be executed as part of the job
+        steps:
+            # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+            -   uses: actions/checkout@v4
+            -   uses: actions/setup-java@v4
+                with:
+                    java-version: '17'
+                    distribution: 'adopt'
+
+            # Runs a set of commands using the runners shell
+            -   name: Test
+                run: mvn -B test