Realit-singer-encodings

**Changes**
- Moving to a trusted push to pypi

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**Changes**
- Making a variant realit-singer-encodings
- Moving from setup.py to project.toml and Poetry instead of setup tools
- Adding ci/cd pipelines for running pytest
- Adding publishing pipeline to pypi
- Adding tox to run ci tests before raising a PR
- Linting code
- Adding README.md

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**Changes**
- Configurable characterset format. Option='encoding'
- Ability to remove a character. Option='remove_character'
- Removed dependency on singer-python
- Ensured that utf-8-sig (default encoding) is used to detect the signature for the likes of BOM metadata.
- Added dependabot monitoring