Add CI workflow for consistency with OpenSearch build image

.github/workflows/CI.yml

@@ -0,0 +1,80 @@
+name: Build and Test LTR
+# This workflow is triggered on pull requests and push to any branches
+on:
+  push:
+    branches-ignore:
+      - 'backport/**'
+      - 'create-pull-request/**'
+      - 'dependabot/**'
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+  Get-CI-Image-Tag:
+    uses: opensearch-project/opensearch-build/.github/workflows/get-ci-image-tag.yml@main
+    with:
+      product: opensearch
+
+  Build-ltr-linux:
+    needs: [Get-CI-Image-Tag]
+    strategy:
+      matrix:
+        java: [21]
+
+    name: Build and Test LTR Plugin on Linux
+    if: github.repository == 'opensearch-project/opensearch-learning-to-rank-base'
+    runs-on: ubuntu-latest
+    container:
+      # using the same image which is used by opensearch-build team to build the OpenSearch Distribution
+      # this image tag is subject to change as more dependencies and updates will arrive over time
+      image: ${{ needs.Get-CI-Image-Tag.outputs.ci-image-version-linux }}
+      # need to switch to root so that github actions can install runner binary on container without permission issues.
+      options: ${{ needs.Get-CI-Image-Tag.outputs.ci-image-start-options }}
+
+    steps:
+      - name: Run start commands
+        run: ${{ needs.Get-CI-Image-Tag.outputs.ci-image-start-command }}
+
+      - name: Setup Java ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+
+      - name: Checkout LTR Code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Build LTR Plugin
+        run: |
+          chown -R 1000:1000 `pwd`
+          su `id -un 1000` -c 'whoami && java -version && 
+                              ./gradlew -Dtests.security.manager=false clean test'
+
+
+  Build-ltr-windows:
+    strategy:
+      matrix:
+        java: [ 21 ]
+    name: Build and Test LTR Plugin on Windows
+    if: github.repository == 'opensearch-project/opensearch-learning-to-rank-base'
+    runs-on: windows-latest
+    steps:
+      - name: Setup Java ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+      - name: Checkout LTR Code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+      - name: Build and Run Tests
+        shell: bash
+        run: |
+          ./gradlew.bat build

.github/workflows/add-untriaged-label.yml

@@ -2,7 +2,7 @@ name: Apply 'untriaged' label during issue lifecycle
 
 on:
   issues:
-    types: [opened, transferred]
+    types: [opened, reopened, transferred]
 
 jobs:
   apply-label: