[hc8] Add support for HC8 CO2 sensor (#11872)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>

tests/components/hc8/common.yaml

@@ -0,0 +1,13 @@
+esphome:
+  on_boot:
+    then:
+      - hc8.calibrate:
+          id: hc8_sensor
+          baseline: 420
+
+sensor:
+  - platform: hc8
+    id: hc8_sensor
+    co2:
+      name: HC8 CO2 Value
+    update_interval: 15s

tests/components/hc8/test.esp32-idf.yaml

@@ -0,0 +1,4 @@
+packages:
+  uart: !include ../../test_build_components/common/uart/esp32-idf.yaml
+
+<<: !include common.yaml

tests/components/hc8/test.esp8266-ard.yaml

@@ -0,0 +1,4 @@
+packages:
+  uart: !include ../../test_build_components/common/uart/esp8266-ard.yaml
+
+<<: !include common.yaml

tests/components/hc8/test.rp2040-ard.yaml

@@ -0,0 +1,4 @@
+packages:
+  uart: !include ../../test_build_components/common/uart/rp2040-ard.yaml
+
+<<: !include common.yaml