[Build] Add GH workflow build for aggregator

Author: HannesWell

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: Continuous Integration
+concurrency: 
+    group: ${{ github.workflow }}-${{ github.ref }}
+    cancel-in-progress: true
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    uses: ./.github/workflows/mavenBuild.yml
+    with:
+      maven-goals: clean verify -Pjavadoc -DskipTests
+      submodules: true
+      extra-setup: |
+        git submodule update --remote
+        mvn clean install -U -pl :eclipse-sdk-prereqs,:org.eclipse.jdt.core.compiler.batch -DlocalEcjVersion=99.99 -Dtycho.version=4.0.12

.github/workflows/mavenBuild.yml

@@ -15,6 +15,11 @@ on:
         type: string
         required: false
         default: 'false'
+      extra-setup:
+        description: Optional command executed initially to perform additional setup of the build environment
+        type: string
+        required: false
+        default: ''
       mavenVersion:
         description: 'The version of Maven set up'
         type: string
@@ -80,6 +85,11 @@ jobs:
       with:
         tycho-version: 4.0.12
 
+    - name: Additional setup
+      if: inputs.extra-setup
+      run: |
+        ${{ inputs.extra-setup }}
+
     - name: Download the API Tools matcher
       uses: suisei-cn/actions-download-file@818d6b7dc8fe73f2f924b6241f2b1134ca1377d9 # v1.6.0
       id: api-tools-matcher