refactor: Refactor `GuppyModule.compile` to get rid of side effects

[mark-koch]

Closes #574

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.65%. Comparing base (2e9da6b) to head (b7bad49).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #619 +/- ## ======================================= Coverage 91.64% 91.65% ======================================= Files 60 60 Lines 6443 6448 +5 ======================================= + Hits 5905 5910 +5 Misses 538 538 ```

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