Add GH actions for build and coverage

Build targets JDK 8, 11, 17

.github/workflows/coverage.yml

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+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Coverage
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ 8 ]
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/cache@v3
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+    - name: Set up JDK ${{ matrix.java }}
+      uses: actions/setup-java@v3
+      with:
+        distribution: adopt
+        java-version: ${{ matrix.java }}
+    - name: Build with Maven
+      run: mvn -V test jacoco:report --no-transfer-progress
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        files: >
+          ./commons-numbers-angle/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-arrays/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-combinatorics/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-complex/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-complex-streams/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-core/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-field/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-fraction/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-gamma/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-primes/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-quaternion/target/site/jacoco/jacoco.xml,
+          ./commons-numbers-rootfinder/target/site/jacoco/jacoco.xml

.github/workflows/maven.yml

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+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Java CI
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ 8, 11, 17 ]
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/cache@v3
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+    - name: Set up JDK ${{ matrix.java }}
+      uses: actions/setup-java@v3
+      with:
+        distribution: adopt
+        java-version: ${{ matrix.java }}
+    - name: Build with Maven
+      # Use the default goal
+      run: mvn -V --no-transfer-progress
+    - name: Build examples with Maven
+      # Examples require Java 11+
+      if: contains(matrix.java, '11')
+      run: -P commons-numbers-examples --projects commons-numbers-examples verify apache-rat:check checkstyle:check