fix(zigbee): Add connected(), minor fixes, example update

[P-R-O-C-H-Y]

Description of Change

This PR adds Zigbee.conneted() function and the Zigbee.begin() is now blocking until the Zigbee is started.
Some minor API changes + example updates.

Tests scenarios

Related links

[github-actions]

	Warnings
⚠️	Please consider squashing your 8 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 P-R-O-C-H-Y, we appreciate your contribution to this project!

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[github-actions]

Test Results

 61 files   61 suites   5m 48s ⏱️
 21 tests  21 ✅ 0 💤 0 ❌
143 runs  143 ✅ 0 💤 0 ❌

Results for commit f5ac1a7.

♻️ This comment has been updated with latest results.

[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
ESP32C6	0	‼️ +17K	0.00	‼️ +3.23	0	⚠️ +1696	0.00	‼️ +5.71
ESP32H2	0	‼️ +14K	0.00	‼️ +2.49	0	⚠️ +1596	0.00	‼️ +5.50

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

Target	ESP32C6		ESP32H2
Example	FLASH	RAM	FLASH	RAM
Zigbee/examples/Zigbee_Color_Dimmable_Light	‼️ +17K	⚠️ +1680	‼️ +14K	⚠️ +1580
Zigbee/examples/Zigbee_Color_Dimmer_Switch	‼️ +9K	⚠️ +936	‼️ +6K	⚠️ +860
Zigbee/examples/Zigbee_On_Off_Light	‼️ +16K	⚠️ +1696	‼️ +13K	⚠️ +1596
Zigbee/examples/Zigbee_On_Off_Switch	‼️ +10K	⚠️ +920	‼️ +6K	⚠️ +860
Zigbee/examples/Zigbee_Scan_Networks	‼️ +13K	⚠️ +1260	‼️ +9K	⚠️ +1128
Zigbee/examples/Zigbee_Temp_Hum_Sensor_Sleepy	‼️ +14K	⚠️ +972	‼️ +11K	⚠️ +832
Zigbee/examples/Zigbee_Temperature_Sensor	‼️ +11K	⚠️ +944	‼️ +8K	⚠️ +836
Zigbee/examples/Zigbee_Thermostat	‼️ +11K	⚠️ +608	‼️ +8K	⚠️ +540

[SuGlider]

LGTM. @P-R-O-C-H-Y - Please take a look to the suggested changes.

Windows requires '\r' + '\n' at the end of a line in order to make it work with most Serial Termnals, such as PuTTY and others.

Adding '\r' doesn't affect Linux or MacOS, but is important to Windows.