refactor: move conversion code to utils

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

Since it's basically become a util file at this point, I might as well move it to the util folder.

Issue

If applicable, what issue does this address?

Closes: #

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.15%. Comparing base (a82d857) to head (09f721d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1671   +/-   ##
=======================================
  Coverage   42.15%   42.15%           
=======================================
  Files         110      110           
  Lines       17478    17478           
=======================================
  Hits         7368     7368           
  Misses      10110    10110           

Flag	Coverage Δ
macos-14	37.79% <ø> (ø)
ubuntu-latest	43.93% <ø> (ø)
windows-2019	37.68% <ø> (ø)

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