Fixed wildcard variants with nested prompts

[adieyal]

If colours.txt contained colours-warm colours-cold

Then {2$$colours} would treat those nested wildcards as strings

[adieyal]

I'm not sure if invoking parse in this utils function is correct.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (00c1b2a) 98.06% compared to head (117c640) 98.06%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #69 +/- ## ======================================= Coverage 98.06% 98.06% ======================================= Files 71 71 Lines 2685 2692 +7 ======================================= + Hits 2633 2640 +7 Misses 52 52 ``` | [Impacted Files](https://codecov.io/gh/adieyal/dynamicprompts/pull/69?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Adi+Eyal) | Coverage Δ | | |---|---|---| | [src/dynamicprompts/samplers/utils.py](https://codecov.io/gh/adieyal/dynamicprompts/pull/69?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Adi+Eyal#diff-c3JjL2R5bmFtaWNwcm9tcHRzL3NhbXBsZXJzL3V0aWxzLnB5) | `100.00% <100.00%> (ø)` | | | [tests/test\_sd\_issues.py](https://codecov.io/gh/adieyal/dynamicprompts/pull/69?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Adi+Eyal#diff-dGVzdHMvdGVzdF9zZF9pc3N1ZXMucHk=) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Adi+Eyal). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Adi+Eyal)

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[adieyal]

Thanks