esp_rmaker_ota: Added OTA Updates over MQTT

The regular OTA upgrades with ESP RainMaker required an additional https
connection to fetch the OTA image, which has a significant impact on
heap usage.

With MQTT OTA, the same MQTT channel used for rest of the RainMaker
communication is used to fetch the OTA image, thereby saving on RAM.
This could be slightly slower and may odd some cost. but the overall
impact would be low enough when compared against the advantages.

Signed-off-by: sanket.wadekar <sanket.wadekar@espressif.com>
Co-authored-by: Piyush Shah <piyush.shah@espressif.com>

.github/workflows/auto-tag.yml

@@ -0,0 +1,102 @@
+name: Auto Tag from Component Version
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'components/esp_rainmaker/idf_component.yml'
+
+  # Allow manual trigger
+  workflow_dispatch:
+
+permissions:
+  contents: write  # Required to create tags
+
+jobs:
+  auto-tag:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0  # Get full history for tagging
+
+    - name: Extract version from component file
+      id: get_version
+      run: |
+        # Extract version from YAML file using grep and sed
+        VERSION=$(grep '^version:' components/esp_rainmaker/idf_component.yml | sed 's/version: *"\(.*\)"/\1/')
+
+        if [ -z "$VERSION" ]; then
+          echo "Error: Could not extract version from idf_component.yml"
+          exit 1
+        fi
+
+        # Validate version format (basic semver check)
+        if ! echo "$VERSION" | grep -qE '^[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.-]+)?(\+[a-zA-Z0-9.-]+)?$'; then
+          echo "Error: Invalid version format: $VERSION"
+          exit 1
+        fi
+
+        echo "Extracted version: $VERSION"
+        echo "version=$VERSION" >> $GITHUB_OUTPUT
+        echo "tag_name=v$VERSION" >> $GITHUB_OUTPUT
+
+    - name: Check if tag already exists
+      id: check_tag
+      run: |
+        TAG_NAME="v${{ steps.get_version.outputs.version }}"
+
+        # Check if tag exists locally
+        if git tag -l | grep -q "^$TAG_NAME$"; then
+          echo "Tag $TAG_NAME already exists locally"
+          echo "tag_exists=true" >> $GITHUB_OUTPUT
+          exit 0
+        fi
+
+        # Check if tag exists on remote
+        if git ls-remote --tags origin | grep -q "refs/tags/$TAG_NAME$"; then
+          echo "Tag $TAG_NAME already exists on remote"
+          echo "tag_exists=true" >> $GITHUB_OUTPUT
+          exit 0
+        fi
+
+        echo "Tag $TAG_NAME does not exist"
+        echo "tag_exists=false" >> $GITHUB_OUTPUT
+
+    - name: Create and push tag
+      if: steps.check_tag.outputs.tag_exists == 'false'
+      run: |
+        TAG_NAME="v${{ steps.get_version.outputs.version }}"
+
+        # Configure git user (use GitHub Actions bot)
+        git config --local user.email "action@github.com"
+        git config --local user.name "GitHub Action"
+
+        # Create annotated tag
+        git tag -a "$TAG_NAME" -m "Release $TAG_NAME - Auto-tagged from idf_component.yml"
+
+        # Push tag to origin
+        git push origin "$TAG_NAME"
+
+        echo "✅ Successfully created and pushed tag: $TAG_NAME"
+
+    - name: Tag already exists
+      if: steps.check_tag.outputs.tag_exists == 'true'
+      run: |
+        TAG_NAME="v${{ steps.get_version.outputs.version }}"
+        echo "ℹ️  Tag $TAG_NAME already exists. Skipping tag creation."
+
+    - name: Summary
+      run: |
+        echo "## Auto-Tag Summary" >> $GITHUB_STEP_SUMMARY
+        echo "- **Component:** esp_rainmaker" >> $GITHUB_STEP_SUMMARY
+        echo "- **Version:** ${{ steps.get_version.outputs.version }}" >> $GITHUB_STEP_SUMMARY
+        echo "- **Tag:** ${{ steps.get_version.outputs.tag_name }}" >> $GITHUB_STEP_SUMMARY
+
+        if [ "${{ steps.check_tag.outputs.tag_exists }}" == "true" ]; then
+          echo "- **Status:** ⚠️ Tag already exists" >> $GITHUB_STEP_SUMMARY
+        else
+          echo "- **Status:** ✅ Tag created successfully" >> $GITHUB_STEP_SUMMARY
+        fi