adding woodpecker CI

.woodpecker.yml

@@ -0,0 +1,17 @@
+pipeline:
+  build:
+    image: espressif/idf:release-v4.1
+    commands:
+      - mkdir ~/.ssh
+      - ssh-keyscan -t rsa git.oit.cloud >> ~/.ssh/known_hosts
+      - git submodule update --init
+      - if [ -f sdkconfig ]; then
+      -   rm sdkconfig
+      - fi
+      - ls
+      - . /opt/esp/idf/export.sh
+      - idf.py reconfigure
+      - echo "BB-CI-$((1 + RANDOM % 999))" > bbid
+      - sed -i -e s/BARBACK_ID=\"Barback\"/BARBACK_ID=\"`cat bbid`\"/ sdkconfig
+      - idf.py reconfigure
+      - idf.py build