Adds configurable I2C address for PCA9685 PWM driver (#26051)

* Adds configurable I2C address for PCA9685 PWM driver

Introduces a parameter to set the I2C address for the PCA9685 PWM output driver, enhancing flexibility for hardware variations. Updates documentation and board initialization scripts to support the new configuration and streamline device startup.

* Update src/drivers/pca9685_pwm_out/module.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/drivers/pca9685_pwm_out/module.yaml

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Jacob Dahl <37091262+dakejahl@users.noreply.github.com>

boards/bluerobotics/navigator/init/rc.board_defaults

@@ -11,3 +11,7 @@ param set BAT1_V_DIV 5.7
 
 # Always keep current config
 param set SYS_AUTOCONFIG 0
+
+# PCA9685 PWM Out defaults
+param set-default PCA9685_EN_BUS 4
+param set-default PCA9685_I2C_ADDR 64

boards/bluerobotics/navigator/init/rc.board_sensors

@@ -28,7 +28,7 @@ then
 	echo "ads1115 not found."
 fi
 
-if ! pca9685_pwm_out start -a 0x40 -b 4
+if ! pca9685_pwm_out start
 then
 	echo "pca9685_pwm_out not found."
 fi