[NEW BOARD] Add environment for board Wemos Lolin C3 mini (#1512)

* Add environment for board Wemos Lolin C3 mini

* Lolin C3 mini: disable serial output as a default

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Co-authored-by: Argafal <dev.omg@argafal.de>

.github/workflows/build.yml

@@ -76,6 +76,7 @@ jobs:
           - "esp32s3-dev-c1-ble"
           - "esp32c3-dev-m1-ble"
           - "airm2m_core_esp32c3"
+          - "lolin_c3_mini"
           - "thingpulse-espgateway"
           - "thingpulse-espgateway-ethernet"
     runs-on: ubuntu-latest