boards: shields: Add MikroElektronika Weather Click shield

Add a shield definition for the MikroElektronika Weather Click board.

The Weather Click board features the BME280 sensor, a combined humidity,
pressure, and temperature sensor from Bosch Sensortec.

This shield can be used with any board equipped with a mikroBUS socket
that provides a `mikrobus_i2c` devicetree node label.

Signed-off-by: Chris Wilson <chris@cgnd.dev>

boards/shields/mikroe_weather_click/Kconfig.shield

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+# Copyright (c) 2024 Common Ground Electronics
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_MIKROE_WEATHER_CLICK
+	def_bool $(shields_list_contains,mikroe_weather_click)

boards/shields/mikroe_weather_click/doc/index.rst

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+.. _mikroe_weather_click_shield:
+
+MikroElektronika Weather Click
+##############################
+
+Overview
+********
+
+The MikroElektronika `Weather Click`_ features the `BME280`_ integrated
+environmental sensor in a `mikroBUS`_ |trade| form factor. The sensor can
+measure relative humidity, barometric pressure, and ambient temperature.
+
+.. figure:: weather-click.webp
+   :align: center
+   :alt: MikroElektronika Weather Click
+
+   MikroElektronika Weather Click (Credit: MikroElektronika)
+
+Requirements
+************
+
+This shield can only be used with a board that provides a mikroBUS |trade|
+socket and defines a ``mikrobus_i2c`` node label for the mikroBUS |trade| I2C
+interface (see :ref:`shields` for more details).
+
+For more information about the BME280 and the Weather Click, see the following
+documentation:
+
+- `Weather Click`_
+- `Weather Click Schematic`_
+- `BME280`_
+- `BME280 Datasheet`_
+
+Programming
+***********
+
+Set ``-DSHIELD=mikroe_weather_click`` when you invoke ``west build``. For
+example:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/sensor/bme280
+   :board: lpcxpresso55s16
+   :shield: mikroe_weather_click
+   :goals: build
+
+.. _Weather Click:
+   https://www.mikroe.com/weather-click
+
+.. _Weather Click Schematic:
+   https://download.mikroe.com/documents/add-on-boards/click/weather/weather-click-schematic-v101.pdf
+
+.. _BME280:
+   https://www.bosch-sensortec.com/products/environmental-sensors/humidity-sensors-bme280/
+
+.. _BME280 Datasheet:
+   https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme280-ds002.pdf
+
+.. _mikroBUS:
+   https://www.mikroe.com/mikrobus

boards/shields/mikroe_weather_click/mikroe_weather_click.overlay

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+/*
+ * Copyright (c) 2024 Common Ground Electronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&mikrobus_i2c {
+	status = "okay";
+
+	bme280_mikroe_weather_click: bme280@76 {
+		compatible = "bosch,bme280";
+		reg = <0x76>;
+	};
+};