Implement fallback search logic when ICU is unavailable #297
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Closes #172
Demo:
2025-05-26.21-08-44.mp4
This pr introduces a fallback Boyer–Moore–Horspool algorithm used for searching the buffer when the ICU library fails to load.
The implementation is working, however since I'm still getting used to writing rust and the time I can devote is quite limited the code probably needs some polishing (maybe better structuring is needed to reuse as much as possible between the ICU and non-ICU search operations).
Anyways I guess it is a good foundation to iterate on.