Add examples for how to add files to the build

[benvillalobos]

I modified my gist to add more examples for how a user could add files to the build.

People who aren't aware of how MSBuild works and want a quick solution to their problem would be grateful for showing multiple options. Hopefully one suits their needs best 😄

[prmerger-automator]

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

[opbld32]

Learn Build status updates of commit 81e2690:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/msbuild/customize-your-build.md	✅Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[jborsecnik]

@ghogen,

Can you review the proposed changes?

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

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

[ghogen]

#sign-off