Matter example patch

[SuGlider]

Description of Change

A change to improve the code and the make it clearer to read and understand how Preference are being used in the code.

Tests scenarios

ESP32-S3 and CI using the example

Related links

#10542 (reply in thread)

[github-actions]

	Warnings
⚠️	Please consider squashing your 7 commits (simplifying branch history).
⚠️	The **target branch** for this Pull Request **must be the default branch** of the project (`master`). If you would like to add this feature to a different branch, please state this in the PR description and we will consider it.

👋 Hello SuGlider, we appreciate your contribution to this project!

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[github-actions]

Memory usage test (comparing PR against master branch)

The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.

Memory	FLASH [bytes]		FLASH [%]		RAM [bytes]		RAM [%]
Target	DEC	INC	DEC	INC	DEC	INC	DEC	INC
ESP32S3	0	0	0.00	0.00	0	0	0.00	0.00
ESP32S2	0	0	0.00	0.00	0	0	0.00	0.00
ESP32C3	0	0	0.00	0.00	0	0	0.00	0.00
ESP32C6	0	0	0.00	0.00	0	0	0.00	0.00
ESP32	0	0	0.00	0.00	0	0	0.00	0.00

Click to expand the detailed deltas report [usage change in BYTES]

Target	ESP32S3		ESP32S2		ESP32C3		ESP32C6		ESP32
Example	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM
Matter/examples/MatterDimmableLight	-	-	-	-	-	-	-	-	-	-
Matter/examples/MatterOnOffLight	-	-	-	-	-	-	-	-	-	-