Title: C++ Standard Template Library Basics Documentation

[silentspectator20]

Explain what you want to add/change in documentation.

I want to add the basics of Standard Template Library Containers like vectors, lists, maps, stack, queues, etc.

Kindly please assign me this issue.

Regards

[Sulagna-Dutta-Roy]

Only one topic documentation please.

[silentspectator20]

@Sulagna-Dutta-Roy I would like to add documentation of maps where I will explain unordered maps and ordered maps. Please assign me this issue.

[silentspectator20]

@Sulagna-Dutta-Roy Kindly please review the PR and Merge it. Any suggestions are welcomed. Thank you!