Add missing .editorconfig settings present in dotnet/runtime

[xtqqczze]

PR Summary

Add settings from https://github.com/dotnet/runtime/blob/master/.editorconfig

We may want a different value for of the new settings, so please leave review comments,

PR Context

#7357

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: or [ WIP ] to the beginning of the title (the WIP bot will keep its status check at Pending while the prefix is present) and remove the prefix when the PR is ready.
• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
    • Experimental feature name(s):
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
  • OR
  • I have considered the user experience from a tooling perspective and enumerated concerns in the summary. This may include:
    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode (which runs in a different PS Host).
    • Impact on Completions (both in the console and in editors) - one of PowerShell's most powerful features.
    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).

[iSazonov]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 4 pipeline(s).

[iSazonov]

@xtqqczze Please rebase to fix CI-static.

[TravisEz13]

cc @daxian-dbw @adityapatwardhan Can you review?

[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Mainainer, Please provide feedback and/or mark it as Waiting on Author

[TravisEz13]

cc @daxian-dbw @adityapatwardhan Can you review?

[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Maintainer, please provide feedback and/or mark it as Waiting on Author

[xtqqczze]

@daxian-dbw Can you please review?

[ghost]

🎉v7.1.0-preview.5 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes