Bug/remove untested functions (#5)

* feat(text): implement string truncation with tests and docs

- Add string truncation with support for custom ellipsis

- Add comprehensive documentation and examples

- Update README with text processing features

- All tests passing

* fix(text): improve string truncation with proper handling of ellipsis and smart truncation

* feat: Add text processing features

* fix: Fix generic parameter inference in String+Extraction

* fix: Fix generic parameter inference in String+Extraction

* fix: Remove untested string distance metric functions

* fix: Remove untested StringMetrics struct and file

Author: owdax