[ReadMe] Update the read me with telemetry guidance

[JoshuaLai]

What

Updating as per Open Source requirements to include telemetry guidance in the README file.

Why

Open Source requirements

[github-actions]

@azure/communication-react jest test coverage for stable.

	Lines	Statements	Functions	Branches
Base	29562 / 47140 62.71%	29562 / 47140 62.71%	815 / 1491 54.66%	2419 / 3845 62.91%
Current	29556 / 47140 62.69%	29556 / 47140 62.69%	815 / 1491 54.66%	2401 / 3836 62.59%
Diff	-6 / 0 -0.02%	-6 / 0 -0.02%	0 / 0 0%	-18 / -9 -0.32%

[github-actions]

@azure/communication-react jest test coverage for beta.

	Lines	Statements	Functions	Branches
Base	58292 / 94616 61.6%	58292 / 94616 61.6%	1186 / 2714 43.69%	3429 / 5791 59.21%
Current	58292 / 94616 61.6%	58292 / 94616 61.6%	1186 / 2714 43.69%	3429 / 5791 59.21%
Diff	0 / 0 0%	0 / 0 0%	0 / 0 0%	0 / 0 0%

[github-actions]

📦 CallWithChat bundle size

Bundle	Base Size (bytes)	Current Size (bytes)	Change	Delta (bytes)
build.bundle.js	6797806	6797806	➖ unchanged	0
350.bundle.js	362425	362425	➖ unchanged	0
398.bundle.js	12413574	12413574	➖ unchanged	0
450.bundle.js	4468	4468	➖ unchanged	0
82.bundle.js	28315	28315	➖ unchanged	0
91.bundle.js	4063	4063	➖ unchanged	0

Total change: +0 B ➖

[github-actions]

📦 Calling bundle size

Bundle	Base Size (bytes)	Current Size (bytes)	Change	Delta (bytes)
build.bundle.js	5822444	5822444	➖ unchanged	0
398.bundle.js	12413560	12413560	➖ unchanged	0

Total change: +0 B ➖

[github-actions]

📦 Chat bundle size

Bundle	Base Size (bytes)	Current Size (bytes)	Change	Delta (bytes)
build.bundle.js	1778428	1778428	➖ unchanged	0
195.bundle.js	365693	365693	➖ unchanged	0
450.bundle.js	4452	4452	➖ unchanged	0
82.bundle.js	28299	28299	➖ unchanged	0
91.bundle.js	4047	4047	➖ unchanged	0

Total change: +0 B ➖