chore: try using two methods for adding files; one which assumes the path is canonical and the other which adds the root and canonicalizes

[kevaundray]

Description

Problem*

Resolves

Summary*

Additional Context

Documentation*

Check one:

• No documentation needed.
• Documentation included in this PR.
• [Exceptional Case] Documentation to be submitted in a separate PR.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[kevaundray]

This essentially allows us to not special case the stdlib in the FileManager