[RX8025T] add RX8025T realtime clock (#13274)

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: J. Nick Koston <nick@home-assistant.io>
Co-authored-by: J. Nick Koston <nick@koston.org>
Co-authored-by: J. Nick Koston <nick+github@koston.org>

tests/components/rx8025t/common.yaml

@@ -0,0 +1,12 @@
+esphome:
+  on_boot:
+    then:
+      - rx8025t.write_time: rx8025t_time
+      - rx8025t.read_time:
+          id: rx8025t_time
+
+time:
+  - platform: rx8025t
+    i2c_id: i2c_bus
+    id: rx8025t_time
+    update_interval: never

tests/components/rx8025t/test.esp32-idf.yaml

@@ -0,0 +1,4 @@
+packages:
+  i2c: !include ../../test_build_components/common/i2c/esp32-idf.yaml
+
+<<: !include common.yaml

tests/components/rx8025t/test.esp8266-ard.yaml

@@ -0,0 +1,4 @@
+packages:
+  i2c: !include ../../test_build_components/common/i2c/esp8266-ard.yaml
+
+<<: !include common.yaml

tests/components/rx8025t/test.nrf52-adafruit.yaml

@@ -0,0 +1,4 @@
+packages:
+  i2c: !include ../../test_build_components/common/i2c/nrf52.yaml
+
+<<: !include common.yaml

tests/components/rx8025t/test.rp2040-ard.yaml

@@ -0,0 +1,4 @@
+packages:
+  i2c: !include ../../test_build_components/common/i2c/rp2040-ard.yaml
+
+<<: !include common.yaml