[Term Entry] C++ Deque Insert()

[codecademy-docs]

Reason/inspiration (optional)

We would like a new entry on the .insert() term under Deque in C++. The entry should go in a new file under docs/content/cpp/concepts/deque/terms/insert/insert.md.

The entry should include:

• An introduction to the concept
• A Syntax section that provides the syntax for the concept
• An Example section that provides an example demonstrating the concept in use
• A Codebyte Example section that provides a codebyte example demonstrating the concept in use

Please refer to the term entry template, content standards and markdown style guide when working on the PR for this issue.

Entry Type (select all that apply)

New Term for Existing Concept Entry

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[Cibiyanna26]

Hey @codecademy-docs I am a contributor from HacktoberFest and would you assign this issue to me, I would like to work on this issue.

[mamtawardhani]

Hey @Cibiyanna26 you have already been assigned to an issue, would you like to work on this as well?

[Cibiyanna26]

Yeah sure @mamtawardhani, after completing #5362, I would like to work on this.

[Cibiyanna26]

Sorry for troubling you @mamtawardhani, I am a contributor from Hacktobest, so the event has mentioned to add labels 'hacktoberfest', 'hacktoberfest-accepted' to the issues which being assigned.

[mamtawardhani]

Hey @Cibiyanna26 no problem, and yes let me check this and get back to you ASAP.
Until then, let me know whenever you wish to work on this

[Cibiyanna26]

I wish to work on this issue, after successfully merged the pr #5364.

[Cibiyanna26]

@mamtawardhani would you assign this issue to me, I am free to work on this issue now.

[mamtawardhani]

Hey @Cibiyanna26 You’re assigned 🎉 In addition to the documents linked in the description, please also look at the Contribution Guide. After creating a PR, the maintainer(s) (with the collaborator label) will add comments/suggestions to address any revisions before approval.