Enhance Attribute Retrieval Guide to Include Member-Level Attributes

[shethaadit]

Summary

Updated the documentation on retrieving information stored in attributes to include details on reading attributes applied to class members.

• Expanded explanations to cover member-level attribute retrieval.
• Clarified usage of GetCustomAttribute and GetCustomAttributes for different scopes.
• Ensured consistency in terminology and improved readability.

Fixes #40174

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docs/standard/attributes/retrieving-information-stored-in-attributes.md	Retrieving Information Stored in Attributes

[shethaadit]

Thank you @BartoszKlonowski for your suggestions. I have applied those. :)
cc: @BillWagner

[BillWagner]

Hi @shethaadit

I reviewed everything, and it looks great. Before I merge it, can you move the sample into a project in a snippets folder so it's under our CI system? That helps us ensure the code is always up to date.

Thanks.

[BillWagner]

Thanks for all the perseverance on this @shethaadit

I'll now.