Add Web Sections and Fix Formatting in RTT Docs

[tayaras]

This pull request includes the following changes:

• Web Sections: Added new web sections to the RTT documentation, including associated .md files.
• Conceptual Docs: Updated the conceptual documentation to improve formatting and correct typos.
• Quickstarts: Made changes to the quickstart guides to fix formatting issues and typos, and to add web content

[prmerger-automator]

@tayaras : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change. @edward

[learn-build-service-prod]

Learn Build status updates of commit c1c74d1:

💡 Validation status: suggestions

File	Status	Preview URL	Details
articles/communication-services/quickstarts/voice-video-calling/get-started-with-real-time-text.md	💡Suggestion		Details
articles/communication-services/concepts/voice-video-calling/real-time-text.md	✅Succeeded
articles/communication-services/quickstarts/voice-video-calling/includes/real-time-text/real-time-text-web.md	✅Succeeded

articles/communication-services/quickstarts/voice-video-calling/get-started-with-real-time-text.md

• Line 0, Column 0: [Suggestion: pivot-group-not-found - See documentation] Pivot group 'acs-programming-languages-javascript-java-swift-csharp' isn't defined in 'articles/zone-pivot-groups.yml'. Make sure every pivot group you reference in your content has been properly defined.

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[prmerger-automator]

PRMerger Results

Issue	Description
Added File(s)	This PR contains added files. New files require human review.
File Change Percent	This PR contains file(s) with more than 30% file change.

[v-dirichards]

@ahammer

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[tayaras]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @ahammer, @edward

[v-dirichards]

@ahammer @edwardlee-msft This content requires automated and human checks available only in the private repository. Please close this PR (#please-close) and move the commits to the private repository. If you need help moving the commits, contact the publicprs alias.