Add sun_gtil2 component (for SUN-1000G2 / SUN-2000G2 grid tie inverters) (#4958)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/sun_gtil2/__init__.py

@@ -0,0 +1,26 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import uart
+from esphome.const import CONF_ID
+
+CODEOWNERS = ["@Mat931"]
+MULTI_CONF = True
+DEPENDENCIES = ["uart"]
+
+CONF_SUN_GTIL2_ID = "sun_gtil2_id"
+
+sun_gtil2_ns = cg.esphome_ns.namespace("sun_gtil2")
+
+SunGTIL2Component = sun_gtil2_ns.class_("SunGTIL2", cg.Component, uart.UARTDevice)
+
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(SunGTIL2Component),
+    }
+).extend(uart.UART_DEVICE_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await uart.register_uart_device(var, config)