feat: add MQTT bridge repeater builds

.github/workflows/eastmesh-build-repeater-mqtt-bridge-firmwares.yml

@@ -0,0 +1,31 @@
+name: EastMesh Build Repeater MQTT Bridge Firmwares
+
+permissions:
+  contents: write
+
+on:
+  workflow_dispatch:
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    env:
+      OFFICIAL_MESHCORE_VERSION: ${{ vars.OFFICIAL_MESHCORE_VERSION }}
+      PLATFORMIO_BUILD_FLAGS: -UMQTT_DEBUG
+    steps:
+
+      - name: Clone Repo
+        uses: actions/checkout@v6
+
+      - name: Setup Build Environment
+        uses: ./.github/actions/setup-build-environment
+
+      - name: Build Firmwares
+        run: /usr/bin/env bash eastmesh-build.sh build-repeater-mqtt-bridge-firmwares
+
+      - name: Upload Workflow Artifacts
+        uses: actions/upload-artifact@v7
+        with:
+          name: repeater-mqtt-bridge-firmwares
+          path: out